/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-MCRwithDepranks-BasicCegarLoop.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-16 13:32:13,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-16 13:32:13,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-16 13:32:14,028 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-16 13:32:14,068 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-MCRwithDepranks-BasicCegarLoop.epf [2022-02-16 13:32:14,095 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-16 13:32:14,096 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-16 13:32:14,097 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-16 13:32:14,097 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-16 13:32:14,098 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-16 13:32:14,098 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-16 13:32:14,098 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-16 13:32:14,098 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-16 13:32:14,098 INFO L138 SettingsManager]: * Use SBE=true [2022-02-16 13:32:14,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-16 13:32:14,099 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-16 13:32:14,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-16 13:32:14,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-16 13:32:14,100 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-16 13:32:14,100 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-16 13:32:14,100 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-16 13:32:14,100 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-16 13:32:14,100 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-16 13:32:14,100 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-16 13:32:14,100 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-16 13:32:14,100 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-16 13:32:14,101 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-16 13:32:14,101 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-16 13:32:14,101 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-16 13:32:14,102 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-16 13:32:14,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-16 13:32:14,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-16 13:32:14,103 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-16 13:32:14,103 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-16 13:32:14,103 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-16 13:32:14,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-16 13:32:14,103 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-16 13:32:14,103 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-16 13:32:14,103 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=MCR_WITH_DEPRANKS [2022-02-16 13:32:14,104 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-16 13:32:14,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-16 13:32:14,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-16 13:32:14,324 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-16 13:32:14,325 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-16 13:32:14,326 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-16 13:32:14,327 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-2.wvr.bpl [2022-02-16 13:32:14,327 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-2.wvr.bpl' [2022-02-16 13:32:14,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-16 13:32:14,349 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-16 13:32:14,350 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-16 13:32:14,350 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-16 13:32:14,350 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-16 13:32:14,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:32:14" (1/1) ... [2022-02-16 13:32:14,369 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:32:14" (1/1) ... [2022-02-16 13:32:14,373 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-16 13:32:14,374 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-16 13:32:14,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-16 13:32:14,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-16 13:32:14,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-16 13:32:14,380 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:32:14" (1/1) ... [2022-02-16 13:32:14,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:32:14" (1/1) ... [2022-02-16 13:32:14,380 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:32:14" (1/1) ... [2022-02-16 13:32:14,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:32:14" (1/1) ... [2022-02-16 13:32:14,382 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:32:14" (1/1) ... [2022-02-16 13:32:14,384 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:32:14" (1/1) ... [2022-02-16 13:32:14,384 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:32:14" (1/1) ... [2022-02-16 13:32:14,385 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-16 13:32:14,386 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-16 13:32:14,386 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-16 13:32:14,386 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-16 13:32:14,387 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:32:14" (1/1) ... [2022-02-16 13:32:14,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-16 13:32:14,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:14,410 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-16 13:32:14,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-16 13:32:14,446 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-16 13:32:14,446 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-16 13:32:14,446 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-16 13:32:14,446 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-16 13:32:14,446 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-16 13:32:14,446 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-16 13:32:14,446 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-16 13:32:14,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-16 13:32:14,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-16 13:32:14,447 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-16 13:32:14,482 INFO L234 CfgBuilder]: Building ICFG [2022-02-16 13:32:14,483 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-16 13:32:14,552 INFO L275 CfgBuilder]: Performing block encoding [2022-02-16 13:32:14,579 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-16 13:32:14,580 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-16 13:32:14,580 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2022-02-16 13:32:14,582 INFO L202 PluginConnector]: Adding new model unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 01:32:14 BoogieIcfgContainer [2022-02-16 13:32:14,582 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-16 13:32:14,583 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-16 13:32:14,583 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-16 13:32:14,587 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-16 13:32:14,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:32:14" (1/2) ... [2022-02-16 13:32:14,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1490f6d8 and model type unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 01:32:14, skipping insertion in model container [2022-02-16 13:32:14,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 01:32:14" (2/2) ... [2022-02-16 13:32:14,594 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.bpl [2022-02-16 13:32:14,598 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-16 13:32:14,598 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-16 13:32:14,598 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-16 13:32:14,599 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-16 13:32:14,633 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-02-16 13:32:14,665 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-16 13:32:14,670 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-16 13:32:14,670 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-02-16 13:32:14,679 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2022-02-16 13:32:14,694 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:14,760 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 178 transitions and produced 102 states. [2022-02-16 13:32:14,766 INFO L276 IsEmpty]: Start isEmpty. Operand has 102 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 101 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:14,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-02-16 13:32:14,772 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:14,773 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:14,773 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:14,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:14,778 INFO L85 PathProgramCache]: Analyzing trace with hash -601032396, now seen corresponding path program 1 times [2022-02-16 13:32:14,801 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:14,802 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849310199] [2022-02-16 13:32:14,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:14,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:14,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:14,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:14,955 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:14,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849310199] [2022-02-16 13:32:14,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849310199] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 13:32:14,956 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 13:32:14,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-16 13:32:14,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676566453] [2022-02-16 13:32:14,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:32:14,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-16 13:32:14,960 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:14,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-16 13:32:14,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-16 13:32:14,981 INFO L87 Difference]: Start difference. First operand has 102 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 101 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:15,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:15,112 INFO L93 Difference]: Finished difference Result 98 states and 128 transitions. [2022-02-16 13:32:15,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-16 13:32:15,115 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-02-16 13:32:15,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:15,122 INFO L225 Difference]: With dead ends: 98 [2022-02-16 13:32:15,122 INFO L226 Difference]: Without dead ends: 66 [2022-02-16 13:32:15,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-02-16 13:32:15,126 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:15,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 11 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:32:15,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-02-16 13:32:15,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 13. [2022-02-16 13:32:15,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:15,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 19 transitions. [2022-02-16 13:32:15,185 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 19 transitions. Word has length 10 [2022-02-16 13:32:15,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:15,186 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 19 transitions. [2022-02-16 13:32:15,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:15,186 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 19 transitions. [2022-02-16 13:32:15,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-02-16 13:32:15,187 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:15,187 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:15,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-16 13:32:15,187 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:15,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:15,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1975591194, now seen corresponding path program 2 times [2022-02-16 13:32:15,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:15,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483481811] [2022-02-16 13:32:15,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:15,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:15,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:15,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:15,248 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:15,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483481811] [2022-02-16 13:32:15,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483481811] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 13:32:15,248 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 13:32:15,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-16 13:32:15,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109863635] [2022-02-16 13:32:15,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:32:15,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-16 13:32:15,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:15,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-16 13:32:15,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-16 13:32:15,251 INFO L87 Difference]: Start difference. First operand 13 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:15,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:15,285 INFO L93 Difference]: Finished difference Result 20 states and 30 transitions. [2022-02-16 13:32:15,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-16 13:32:15,286 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-02-16 13:32:15,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:15,286 INFO L225 Difference]: With dead ends: 20 [2022-02-16 13:32:15,286 INFO L226 Difference]: Without dead ends: 16 [2022-02-16 13:32:15,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-16 13:32:15,288 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:15,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 10 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:32:15,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-02-16 13:32:15,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2022-02-16 13:32:15,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:15,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 20 transitions. [2022-02-16 13:32:15,292 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 20 transitions. Word has length 10 [2022-02-16 13:32:15,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:15,292 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 20 transitions. [2022-02-16 13:32:15,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:15,293 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 20 transitions. [2022-02-16 13:32:15,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-16 13:32:15,293 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:15,293 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:15,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-16 13:32:15,294 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:15,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:15,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1889874031, now seen corresponding path program 1 times [2022-02-16 13:32:15,294 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:15,295 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050696875] [2022-02-16 13:32:15,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:15,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:15,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:15,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:15,379 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:15,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050696875] [2022-02-16 13:32:15,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050696875] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:15,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750244641] [2022-02-16 13:32:15,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:15,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:15,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:15,384 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:15,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-16 13:32:15,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:15,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 13:32:15,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:15,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-16 13:32:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:15,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:15,792 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:15,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 25 [2022-02-16 13:32:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:15,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750244641] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:15,862 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:15,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-02-16 13:32:15,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250377898] [2022-02-16 13:32:15,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:15,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-16 13:32:15,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:15,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-16 13:32:15,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-16 13:32:15,866 INFO L87 Difference]: Start difference. First operand 14 states and 20 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:15,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:15,960 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2022-02-16 13:32:15,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-16 13:32:15,961 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-02-16 13:32:15,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:15,963 INFO L225 Difference]: With dead ends: 21 [2022-02-16 13:32:15,963 INFO L226 Difference]: Without dead ends: 17 [2022-02-16 13:32:15,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-02-16 13:32:15,968 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:15,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 12 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:32:15,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-02-16 13:32:15,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-02-16 13:32:15,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:15,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 25 transitions. [2022-02-16 13:32:15,978 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 25 transitions. Word has length 11 [2022-02-16 13:32:15,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:15,979 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 25 transitions. [2022-02-16 13:32:15,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:15,979 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 25 transitions. [2022-02-16 13:32:15,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-16 13:32:15,979 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:15,980 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:16,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-16 13:32:16,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:16,200 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:16,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:16,200 INFO L85 PathProgramCache]: Analyzing trace with hash -662282930, now seen corresponding path program 1 times [2022-02-16 13:32:16,201 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:16,201 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619527480] [2022-02-16 13:32:16,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:16,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:16,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:16,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:16,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:16,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619527480] [2022-02-16 13:32:16,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619527480] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 13:32:16,245 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 13:32:16,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-16 13:32:16,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529948817] [2022-02-16 13:32:16,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:32:16,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-16 13:32:16,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:16,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-16 13:32:16,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-16 13:32:16,247 INFO L87 Difference]: Start difference. First operand 16 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:16,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:16,272 INFO L93 Difference]: Finished difference Result 18 states and 29 transitions. [2022-02-16 13:32:16,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-16 13:32:16,274 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-02-16 13:32:16,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:16,274 INFO L225 Difference]: With dead ends: 18 [2022-02-16 13:32:16,274 INFO L226 Difference]: Without dead ends: 18 [2022-02-16 13:32:16,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-16 13:32:16,275 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:16,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 10 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:32:16,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-02-16 13:32:16,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-02-16 13:32:16,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:16,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 28 transitions. [2022-02-16 13:32:16,279 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 28 transitions. Word has length 11 [2022-02-16 13:32:16,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:16,279 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 28 transitions. [2022-02-16 13:32:16,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:16,279 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 28 transitions. [2022-02-16 13:32:16,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-16 13:32:16,280 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:16,280 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:16,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-16 13:32:16,280 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:16,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:16,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1882143633, now seen corresponding path program 2 times [2022-02-16 13:32:16,281 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:16,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729997134] [2022-02-16 13:32:16,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:16,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:16,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:16,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:16,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:16,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729997134] [2022-02-16 13:32:16,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729997134] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:16,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364183073] [2022-02-16 13:32:16,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:32:16,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:16,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:16,340 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:16,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-16 13:32:16,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:32:16,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:16,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-16 13:32:16,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:16,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 13:32:16,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:16,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:16,558 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:16,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2022-02-16 13:32:16,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:16,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364183073] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:16,611 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:16,611 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-02-16 13:32:16,611 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053431216] [2022-02-16 13:32:16,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:16,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-16 13:32:16,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:16,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-16 13:32:16,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-16 13:32:16,614 INFO L87 Difference]: Start difference. First operand 17 states and 28 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:16,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:16,677 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2022-02-16 13:32:16,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-16 13:32:16,680 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-02-16 13:32:16,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:16,681 INFO L225 Difference]: With dead ends: 30 [2022-02-16 13:32:16,681 INFO L226 Difference]: Without dead ends: 26 [2022-02-16 13:32:16,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-02-16 13:32:16,682 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:16,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 16 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:32:16,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-02-16 13:32:16,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 18. [2022-02-16 13:32:16,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:16,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 29 transitions. [2022-02-16 13:32:16,685 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 29 transitions. Word has length 11 [2022-02-16 13:32:16,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:16,685 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 29 transitions. [2022-02-16 13:32:16,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:16,686 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 29 transitions. [2022-02-16 13:32:16,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-16 13:32:16,686 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:16,686 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:16,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:16,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:16,900 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:16,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:16,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1830758967, now seen corresponding path program 1 times [2022-02-16 13:32:16,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:16,901 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305714840] [2022-02-16 13:32:16,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:16,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:16,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:16,940 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:16,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305714840] [2022-02-16 13:32:16,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305714840] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:16,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223220424] [2022-02-16 13:32:16,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:16,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:16,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:16,942 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:16,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-16 13:32:16,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:16,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-16 13:32:16,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:17,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:17,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:17,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:17,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223220424] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:17,041 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:17,041 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-02-16 13:32:17,041 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653276680] [2022-02-16 13:32:17,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:17,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-16 13:32:17,042 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:17,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-16 13:32:17,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-16 13:32:17,044 INFO L87 Difference]: Start difference. First operand 18 states and 29 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:17,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:17,094 INFO L93 Difference]: Finished difference Result 37 states and 53 transitions. [2022-02-16 13:32:17,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-16 13:32:17,095 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-02-16 13:32:17,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:17,095 INFO L225 Difference]: With dead ends: 37 [2022-02-16 13:32:17,096 INFO L226 Difference]: Without dead ends: 36 [2022-02-16 13:32:17,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-16 13:32:17,096 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 21 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:17,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 19 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:32:17,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-16 13:32:17,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 20. [2022-02-16 13:32:17,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:17,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 36 transitions. [2022-02-16 13:32:17,100 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 36 transitions. Word has length 12 [2022-02-16 13:32:17,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:17,100 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 36 transitions. [2022-02-16 13:32:17,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:17,100 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 36 transitions. [2022-02-16 13:32:17,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-16 13:32:17,101 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:17,101 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:17,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:17,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:17,322 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:17,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:17,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1798561940, now seen corresponding path program 3 times [2022-02-16 13:32:17,323 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:17,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859770580] [2022-02-16 13:32:17,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:17,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:17,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:17,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:17,356 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:17,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859770580] [2022-02-16 13:32:17,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859770580] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:17,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699074643] [2022-02-16 13:32:17,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:32:17,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:17,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:17,358 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:17,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-16 13:32:17,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:32:17,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:17,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-16 13:32:17,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:17,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:17,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:17,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:17,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699074643] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:17,451 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:17,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-02-16 13:32:17,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968599589] [2022-02-16 13:32:17,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:17,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-16 13:32:17,452 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:17,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-16 13:32:17,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-16 13:32:17,453 INFO L87 Difference]: Start difference. First operand 20 states and 36 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:17,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:17,489 INFO L93 Difference]: Finished difference Result 37 states and 55 transitions. [2022-02-16 13:32:17,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-16 13:32:17,489 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-02-16 13:32:17,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:17,492 INFO L225 Difference]: With dead ends: 37 [2022-02-16 13:32:17,492 INFO L226 Difference]: Without dead ends: 37 [2022-02-16 13:32:17,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-02-16 13:32:17,493 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 19 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:17,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 25 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:32:17,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-02-16 13:32:17,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2022-02-16 13:32:17,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:17,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2022-02-16 13:32:17,504 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 12 [2022-02-16 13:32:17,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:17,505 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2022-02-16 13:32:17,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:17,505 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2022-02-16 13:32:17,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-16 13:32:17,505 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:17,505 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:17,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:17,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:17,719 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:17,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:17,720 INFO L85 PathProgramCache]: Analyzing trace with hash -753595021, now seen corresponding path program 2 times [2022-02-16 13:32:17,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:17,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304038446] [2022-02-16 13:32:17,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:17,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:17,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:17,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304038446] [2022-02-16 13:32:17,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304038446] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:17,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483763894] [2022-02-16 13:32:17,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:32:17,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:17,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:17,754 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:17,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-16 13:32:17,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:32:17,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:17,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-16 13:32:17,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:17,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:17,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:17,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:17,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483763894] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:17,829 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:17,829 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-02-16 13:32:17,829 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085839324] [2022-02-16 13:32:17,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:17,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-16 13:32:17,830 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:17,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-16 13:32:17,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-16 13:32:17,830 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:17,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:17,875 INFO L93 Difference]: Finished difference Result 31 states and 48 transitions. [2022-02-16 13:32:17,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-16 13:32:17,875 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-02-16 13:32:17,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:17,876 INFO L225 Difference]: With dead ends: 31 [2022-02-16 13:32:17,876 INFO L226 Difference]: Without dead ends: 31 [2022-02-16 13:32:17,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-16 13:32:17,877 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:17,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 22 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:32:17,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-02-16 13:32:17,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 21. [2022-02-16 13:32:17,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:17,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 36 transitions. [2022-02-16 13:32:17,887 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 36 transitions. Word has length 12 [2022-02-16 13:32:17,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:17,887 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 36 transitions. [2022-02-16 13:32:17,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:17,888 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 36 transitions. [2022-02-16 13:32:17,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-16 13:32:17,888 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:17,888 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:17,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:18,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:18,106 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:18,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:18,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1790831542, now seen corresponding path program 4 times [2022-02-16 13:32:18,107 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:18,107 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839839937] [2022-02-16 13:32:18,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:18,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:18,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:18,141 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:18,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839839937] [2022-02-16 13:32:18,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839839937] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:18,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436130540] [2022-02-16 13:32:18,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:32:18,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:18,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:18,143 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:18,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-16 13:32:18,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:32:18,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:18,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-16 13:32:18,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:18,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:18,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:18,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:18,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436130540] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:18,228 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:18,228 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-02-16 13:32:18,228 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768942423] [2022-02-16 13:32:18,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:18,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-16 13:32:18,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:18,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-16 13:32:18,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-16 13:32:18,229 INFO L87 Difference]: Start difference. First operand 21 states and 36 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:18,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:18,269 INFO L93 Difference]: Finished difference Result 29 states and 43 transitions. [2022-02-16 13:32:18,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-16 13:32:18,271 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-02-16 13:32:18,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:18,271 INFO L225 Difference]: With dead ends: 29 [2022-02-16 13:32:18,271 INFO L226 Difference]: Without dead ends: 28 [2022-02-16 13:32:18,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-16 13:32:18,272 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 14 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:18,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 19 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:32:18,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-02-16 13:32:18,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2022-02-16 13:32:18,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:18,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 35 transitions. [2022-02-16 13:32:18,275 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 35 transitions. Word has length 12 [2022-02-16 13:32:18,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:18,275 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 35 transitions. [2022-02-16 13:32:18,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:18,275 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 35 transitions. [2022-02-16 13:32:18,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-16 13:32:18,276 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:18,276 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:18,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:18,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:18,488 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:18,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:18,488 INFO L85 PathProgramCache]: Analyzing trace with hash -8892523, now seen corresponding path program 3 times [2022-02-16 13:32:18,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:18,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826018203] [2022-02-16 13:32:18,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:18,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:18,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:18,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:18,513 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:18,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826018203] [2022-02-16 13:32:18,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826018203] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:18,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386296146] [2022-02-16 13:32:18,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:32:18,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:18,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:18,514 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:18,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-16 13:32:18,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:32:18,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:18,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-16 13:32:18,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:18,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:18,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:18,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:18,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386296146] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:18,612 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:18,612 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-02-16 13:32:18,612 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501994691] [2022-02-16 13:32:18,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:18,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-16 13:32:18,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:18,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-16 13:32:18,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-16 13:32:18,613 INFO L87 Difference]: Start difference. First operand 21 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:18,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:18,661 INFO L93 Difference]: Finished difference Result 28 states and 48 transitions. [2022-02-16 13:32:18,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-16 13:32:18,662 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-02-16 13:32:18,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:18,662 INFO L225 Difference]: With dead ends: 28 [2022-02-16 13:32:18,662 INFO L226 Difference]: Without dead ends: 28 [2022-02-16 13:32:18,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-16 13:32:18,663 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:18,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 13 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:32:18,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-02-16 13:32:18,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2022-02-16 13:32:18,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:18,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 41 transitions. [2022-02-16 13:32:18,665 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 41 transitions. Word has length 12 [2022-02-16 13:32:18,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:18,665 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 41 transitions. [2022-02-16 13:32:18,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:18,666 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 41 transitions. [2022-02-16 13:32:18,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-16 13:32:18,666 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:18,666 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:18,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:18,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:18,868 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:18,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:18,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1014730758, now seen corresponding path program 5 times [2022-02-16 13:32:18,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:18,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080851904] [2022-02-16 13:32:18,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:18,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:18,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:18,899 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:18,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080851904] [2022-02-16 13:32:18,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080851904] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 13:32:18,899 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 13:32:18,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-16 13:32:18,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809716222] [2022-02-16 13:32:18,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:32:18,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-16 13:32:18,901 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:18,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-16 13:32:18,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-16 13:32:18,902 INFO L87 Difference]: Start difference. First operand 23 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:18,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:18,920 INFO L93 Difference]: Finished difference Result 25 states and 42 transitions. [2022-02-16 13:32:18,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-16 13:32:18,920 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-02-16 13:32:18,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:18,921 INFO L225 Difference]: With dead ends: 25 [2022-02-16 13:32:18,921 INFO L226 Difference]: Without dead ends: 23 [2022-02-16 13:32:18,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-16 13:32:18,922 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:18,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 7 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:32:18,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-02-16 13:32:18,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-02-16 13:32:18,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:18,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 40 transitions. [2022-02-16 13:32:18,925 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 40 transitions. Word has length 12 [2022-02-16 13:32:18,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:18,926 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 40 transitions. [2022-02-16 13:32:18,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:18,926 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 40 transitions. [2022-02-16 13:32:18,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:32:18,926 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:18,926 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:18,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-16 13:32:18,927 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:18,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:18,927 INFO L85 PathProgramCache]: Analyzing trace with hash -999915854, now seen corresponding path program 4 times [2022-02-16 13:32:18,927 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:18,927 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897007174] [2022-02-16 13:32:18,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:18,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:18,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:19,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:19,010 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:19,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897007174] [2022-02-16 13:32:19,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897007174] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:19,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060140868] [2022-02-16 13:32:19,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:32:19,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:19,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:19,011 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:19,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-16 13:32:19,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:32:19,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:19,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:32:19,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:19,188 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:19,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 50 [2022-02-16 13:32:19,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:19,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:19,397 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:19,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 31 treesize of output 106 [2022-02-16 13:32:19,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:19,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060140868] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:19,664 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:19,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-02-16 13:32:19,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555156743] [2022-02-16 13:32:19,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:19,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:32:19,665 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:19,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:32:19,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:32:19,666 INFO L87 Difference]: Start difference. First operand 23 states and 40 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:19,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:19,883 INFO L93 Difference]: Finished difference Result 40 states and 68 transitions. [2022-02-16 13:32:19,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:32:19,883 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:32:19,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:19,884 INFO L225 Difference]: With dead ends: 40 [2022-02-16 13:32:19,884 INFO L226 Difference]: Without dead ends: 29 [2022-02-16 13:32:19,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:32:19,885 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 22 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:19,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 28 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:32:19,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-16 13:32:19,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-02-16 13:32:19,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:19,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 53 transitions. [2022-02-16 13:32:19,888 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 53 transitions. Word has length 13 [2022-02-16 13:32:19,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:19,888 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 53 transitions. [2022-02-16 13:32:19,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:19,888 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 53 transitions. [2022-02-16 13:32:19,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:32:19,888 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:19,889 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:19,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:20,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-16 13:32:20,104 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:20,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:20,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1007646252, now seen corresponding path program 5 times [2022-02-16 13:32:20,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:20,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878373363] [2022-02-16 13:32:20,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:20,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:20,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:20,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:20,173 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:20,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878373363] [2022-02-16 13:32:20,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878373363] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:20,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310352811] [2022-02-16 13:32:20,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:32:20,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:20,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:20,175 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:20,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-16 13:32:20,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:32:20,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:20,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:32:20,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:20,318 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:20,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 50 [2022-02-16 13:32:20,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:20,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:20,546 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:20,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 31 treesize of output 106 [2022-02-16 13:32:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:20,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310352811] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:20,914 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:20,914 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-02-16 13:32:20,915 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414878236] [2022-02-16 13:32:20,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:20,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:32:20,915 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:20,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:32:20,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:32:20,916 INFO L87 Difference]: Start difference. First operand 27 states and 53 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:21,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:21,037 INFO L93 Difference]: Finished difference Result 47 states and 89 transitions. [2022-02-16 13:32:21,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-16 13:32:21,038 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:32:21,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:21,038 INFO L225 Difference]: With dead ends: 47 [2022-02-16 13:32:21,038 INFO L226 Difference]: Without dead ends: 39 [2022-02-16 13:32:21,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:32:21,039 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:21,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 19 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:32:21,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-02-16 13:32:21,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 27. [2022-02-16 13:32:21,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:21,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 53 transitions. [2022-02-16 13:32:21,042 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 53 transitions. Word has length 13 [2022-02-16 13:32:21,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:21,042 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 53 transitions. [2022-02-16 13:32:21,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:21,042 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 53 transitions. [2022-02-16 13:32:21,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:32:21,043 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:21,043 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:21,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:21,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-16 13:32:21,259 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:21,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:21,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1455399952, now seen corresponding path program 6 times [2022-02-16 13:32:21,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:21,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998058165] [2022-02-16 13:32:21,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:21,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:21,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:21,322 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:21,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998058165] [2022-02-16 13:32:21,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998058165] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:21,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663758769] [2022-02-16 13:32:21,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:32:21,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:21,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:21,323 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:21,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-16 13:32:21,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:32:21,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:21,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:32:21,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:21,486 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:21,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 50 [2022-02-16 13:32:21,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:21,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:21,666 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:21,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 31 treesize of output 106 [2022-02-16 13:32:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:21,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663758769] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:21,885 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:21,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-02-16 13:32:21,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657275613] [2022-02-16 13:32:21,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:21,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:32:21,886 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:21,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:32:21,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:32:21,886 INFO L87 Difference]: Start difference. First operand 27 states and 53 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:22,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:22,044 INFO L93 Difference]: Finished difference Result 44 states and 84 transitions. [2022-02-16 13:32:22,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:32:22,044 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:32:22,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:22,045 INFO L225 Difference]: With dead ends: 44 [2022-02-16 13:32:22,045 INFO L226 Difference]: Without dead ends: 34 [2022-02-16 13:32:22,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:32:22,046 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 29 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:22,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 22 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:32:22,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-16 13:32:22,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-02-16 13:32:22,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:22,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 70 transitions. [2022-02-16 13:32:22,048 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 70 transitions. Word has length 13 [2022-02-16 13:32:22,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:22,049 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 70 transitions. [2022-02-16 13:32:22,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:22,049 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 70 transitions. [2022-02-16 13:32:22,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:32:22,049 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:22,049 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:22,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:22,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-16 13:32:22,267 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:22,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:22,268 INFO L85 PathProgramCache]: Analyzing trace with hash -262943754, now seen corresponding path program 7 times [2022-02-16 13:32:22,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:22,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740974758] [2022-02-16 13:32:22,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:22,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:22,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:22,338 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:22,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740974758] [2022-02-16 13:32:22,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740974758] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:22,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371717113] [2022-02-16 13:32:22,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:32:22,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:22,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:22,339 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:22,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-16 13:32:22,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:22,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:32:22,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:22,479 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:22,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 50 [2022-02-16 13:32:22,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:22,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:22,660 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:22,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 31 treesize of output 106 [2022-02-16 13:32:22,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:22,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371717113] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:22,887 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:22,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-02-16 13:32:22,887 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793474885] [2022-02-16 13:32:22,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:22,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:32:22,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:22,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:32:22,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:32:22,888 INFO L87 Difference]: Start difference. First operand 32 states and 70 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:23,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:23,057 INFO L93 Difference]: Finished difference Result 61 states and 109 transitions. [2022-02-16 13:32:23,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 13:32:23,058 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:32:23,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:23,058 INFO L225 Difference]: With dead ends: 61 [2022-02-16 13:32:23,058 INFO L226 Difference]: Without dead ends: 48 [2022-02-16 13:32:23,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:32:23,059 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 35 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:23,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 33 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:32:23,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-16 13:32:23,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 32. [2022-02-16 13:32:23,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:23,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 69 transitions. [2022-02-16 13:32:23,062 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 69 transitions. Word has length 13 [2022-02-16 13:32:23,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:23,062 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 69 transitions. [2022-02-16 13:32:23,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:23,062 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 69 transitions. [2022-02-16 13:32:23,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:32:23,063 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:23,063 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:23,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:23,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-16 13:32:23,277 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:23,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:23,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1447669554, now seen corresponding path program 8 times [2022-02-16 13:32:23,278 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:23,278 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762963069] [2022-02-16 13:32:23,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:23,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:23,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:23,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:23,343 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:23,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762963069] [2022-02-16 13:32:23,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762963069] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:23,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845479388] [2022-02-16 13:32:23,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:32:23,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:23,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:23,345 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:23,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-16 13:32:23,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:32:23,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:23,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:32:23,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:23,500 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:23,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2022-02-16 13:32:23,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:23,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:23,670 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:23,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 31 treesize of output 106 [2022-02-16 13:32:24,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:24,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845479388] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:24,151 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:24,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-02-16 13:32:24,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993955817] [2022-02-16 13:32:24,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:24,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:32:24,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:24,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:32:24,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:32:24,153 INFO L87 Difference]: Start difference. First operand 32 states and 69 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:24,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:24,416 INFO L93 Difference]: Finished difference Result 78 states and 139 transitions. [2022-02-16 13:32:24,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 13:32:24,416 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:32:24,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:24,417 INFO L225 Difference]: With dead ends: 78 [2022-02-16 13:32:24,417 INFO L226 Difference]: Without dead ends: 65 [2022-02-16 13:32:24,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:32:24,418 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 35 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:24,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 51 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:32:24,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-02-16 13:32:24,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 33. [2022-02-16 13:32:24,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 2.25) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:24,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 72 transitions. [2022-02-16 13:32:24,420 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 72 transitions. Word has length 13 [2022-02-16 13:32:24,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:24,421 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 72 transitions. [2022-02-16 13:32:24,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:24,421 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 72 transitions. [2022-02-16 13:32:24,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:32:24,421 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:24,421 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:24,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:24,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-16 13:32:24,643 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:24,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:24,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1228626386, now seen corresponding path program 9 times [2022-02-16 13:32:24,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:24,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345363736] [2022-02-16 13:32:24,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:24,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:24,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:24,717 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:24,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345363736] [2022-02-16 13:32:24,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345363736] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:24,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872636862] [2022-02-16 13:32:24,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:32:24,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:24,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:24,718 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:24,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-16 13:32:24,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:32:24,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:24,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:32:24,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:24,880 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:24,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 50 [2022-02-16 13:32:24,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:24,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:25,112 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:25,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 31 treesize of output 106 [2022-02-16 13:32:25,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:25,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872636862] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:25,339 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:25,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-02-16 13:32:25,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399496829] [2022-02-16 13:32:25,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:25,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:32:25,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:25,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:32:25,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:32:25,340 INFO L87 Difference]: Start difference. First operand 33 states and 72 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:25,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:25,483 INFO L93 Difference]: Finished difference Result 51 states and 106 transitions. [2022-02-16 13:32:25,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:32:25,484 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:32:25,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:25,484 INFO L225 Difference]: With dead ends: 51 [2022-02-16 13:32:25,484 INFO L226 Difference]: Without dead ends: 41 [2022-02-16 13:32:25,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:32:25,485 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 30 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:25,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 23 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:32:25,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-02-16 13:32:25,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2022-02-16 13:32:25,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:25,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 89 transitions. [2022-02-16 13:32:25,487 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 89 transitions. Word has length 13 [2022-02-16 13:32:25,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:25,488 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 89 transitions. [2022-02-16 13:32:25,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:25,488 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 89 transitions. [2022-02-16 13:32:25,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:32:25,488 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:25,488 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:25,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:25,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-16 13:32:25,703 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:25,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:25,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1347997204, now seen corresponding path program 10 times [2022-02-16 13:32:25,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:25,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025679325] [2022-02-16 13:32:25,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:25,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:25,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:25,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:25,777 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:25,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025679325] [2022-02-16 13:32:25,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025679325] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:25,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209729814] [2022-02-16 13:32:25,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:32:25,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:25,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:25,778 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:25,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-16 13:32:25,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:32:25,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:25,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:32:25,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:25,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:25,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 50 [2022-02-16 13:32:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:25,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:26,122 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:26,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 31 treesize of output 106 [2022-02-16 13:32:26,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:26,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209729814] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:26,378 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:26,378 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-02-16 13:32:26,378 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511585504] [2022-02-16 13:32:26,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:26,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:32:26,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:26,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:32:26,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:32:26,379 INFO L87 Difference]: Start difference. First operand 38 states and 89 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:26,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:26,590 INFO L93 Difference]: Finished difference Result 67 states and 138 transitions. [2022-02-16 13:32:26,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-16 13:32:26,591 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:32:26,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:26,591 INFO L225 Difference]: With dead ends: 67 [2022-02-16 13:32:26,591 INFO L226 Difference]: Without dead ends: 59 [2022-02-16 13:32:26,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:32:26,592 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 21 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:26,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 32 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:32:26,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-02-16 13:32:26,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 38. [2022-02-16 13:32:26,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:26,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 89 transitions. [2022-02-16 13:32:26,595 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 89 transitions. Word has length 13 [2022-02-16 13:32:26,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:26,595 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 89 transitions. [2022-02-16 13:32:26,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:26,595 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 89 transitions. [2022-02-16 13:32:26,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:32:26,596 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:26,596 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:26,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:26,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:26,797 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:26,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:26,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1236356784, now seen corresponding path program 11 times [2022-02-16 13:32:26,797 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:26,797 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742189893] [2022-02-16 13:32:26,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:26,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:26,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:26,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:26,869 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:26,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742189893] [2022-02-16 13:32:26,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742189893] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:26,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831886101] [2022-02-16 13:32:26,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:32:26,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:26,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:26,871 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:26,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-16 13:32:26,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:32:26,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:26,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:32:26,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:27,028 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:27,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2022-02-16 13:32:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:27,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:27,235 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:27,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 31 treesize of output 106 [2022-02-16 13:32:27,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:27,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831886101] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:27,548 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:27,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-02-16 13:32:27,549 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724020063] [2022-02-16 13:32:27,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:27,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:32:27,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:27,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:32:27,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:32:27,549 INFO L87 Difference]: Start difference. First operand 38 states and 89 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:27,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:27,830 INFO L93 Difference]: Finished difference Result 80 states and 154 transitions. [2022-02-16 13:32:27,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 13:32:27,831 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:32:27,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:27,831 INFO L225 Difference]: With dead ends: 80 [2022-02-16 13:32:27,831 INFO L226 Difference]: Without dead ends: 57 [2022-02-16 13:32:27,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:32:27,832 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 64 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:27,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 26 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:32:27,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-16 13:32:27,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 38. [2022-02-16 13:32:27,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 37 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:27,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 87 transitions. [2022-02-16 13:32:27,835 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 87 transitions. Word has length 13 [2022-02-16 13:32:27,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:27,835 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 87 transitions. [2022-02-16 13:32:27,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:27,835 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 87 transitions. [2022-02-16 13:32:27,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-16 13:32:27,835 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:27,835 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:27,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:28,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:28,052 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:28,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:28,052 INFO L85 PathProgramCache]: Analyzing trace with hash 253048212, now seen corresponding path program 12 times [2022-02-16 13:32:28,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:28,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046270349] [2022-02-16 13:32:28,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:28,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:28,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:28,110 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:28,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046270349] [2022-02-16 13:32:28,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046270349] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:28,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216332362] [2022-02-16 13:32:28,110 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:32:28,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:28,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:28,112 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:28,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-16 13:32:28,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:32:28,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:28,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:32:28,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:28,249 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:28,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2022-02-16 13:32:28,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:28,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:28,398 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:28,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 31 treesize of output 106 [2022-02-16 13:32:28,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:28,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216332362] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:28,668 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:28,668 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-16 13:32:28,668 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636861200] [2022-02-16 13:32:28,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:28,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:32:28,669 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:28,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:32:28,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:32:28,669 INFO L87 Difference]: Start difference. First operand 38 states and 87 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:28,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:28,879 INFO L93 Difference]: Finished difference Result 58 states and 126 transitions. [2022-02-16 13:32:28,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-16 13:32:28,880 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-16 13:32:28,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:28,880 INFO L225 Difference]: With dead ends: 58 [2022-02-16 13:32:28,880 INFO L226 Difference]: Without dead ends: 54 [2022-02-16 13:32:28,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:32:28,881 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:28,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 19 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:32:28,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-02-16 13:32:28,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2022-02-16 13:32:28,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 38 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:28,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 88 transitions. [2022-02-16 13:32:28,883 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 88 transitions. Word has length 13 [2022-02-16 13:32:28,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:28,883 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 88 transitions. [2022-02-16 13:32:28,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:28,884 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 88 transitions. [2022-02-16 13:32:28,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:32:28,884 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:28,884 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:28,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:29,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:29,085 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:29,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:29,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1443477911, now seen corresponding path program 13 times [2022-02-16 13:32:29,085 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:29,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494201684] [2022-02-16 13:32:29,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:29,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:29,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:29,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:29,150 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:29,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494201684] [2022-02-16 13:32:29,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494201684] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:29,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950924736] [2022-02-16 13:32:29,150 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:32:29,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:29,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:29,152 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:29,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-16 13:32:29,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:29,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:32:29,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:29,324 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:29,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 50 [2022-02-16 13:32:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:29,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:29,533 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:29,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 35 treesize of output 150 [2022-02-16 13:32:31,051 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:31,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950924736] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:31,051 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:31,051 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-02-16 13:32:31,051 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035774512] [2022-02-16 13:32:31,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:31,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:32:31,052 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:31,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:32:31,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:32:31,052 INFO L87 Difference]: Start difference. First operand 39 states and 88 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:31,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:31,354 INFO L93 Difference]: Finished difference Result 75 states and 138 transitions. [2022-02-16 13:32:31,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:32:31,355 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:32:31,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:31,355 INFO L225 Difference]: With dead ends: 75 [2022-02-16 13:32:31,355 INFO L226 Difference]: Without dead ends: 51 [2022-02-16 13:32:31,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:32:31,356 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 36 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:31,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 56 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:32:31,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-16 13:32:31,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2022-02-16 13:32:31,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 42 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:31,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 98 transitions. [2022-02-16 13:32:31,359 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 98 transitions. Word has length 14 [2022-02-16 13:32:31,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:31,359 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 98 transitions. [2022-02-16 13:32:31,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:31,359 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 98 transitions. [2022-02-16 13:32:31,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:32:31,360 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:31,360 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:31,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-02-16 13:32:31,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:31,575 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:31,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:31,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1346636756, now seen corresponding path program 14 times [2022-02-16 13:32:31,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:31,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273124195] [2022-02-16 13:32:31,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:31,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:31,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:31,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:31,624 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:31,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273124195] [2022-02-16 13:32:31,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273124195] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:31,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509909737] [2022-02-16 13:32:31,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:32:31,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:31,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:31,626 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:31,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-16 13:32:31,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:32:31,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:31,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-16 13:32:31,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:31,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:31,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:31,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509909737] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:31,711 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:31,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2022-02-16 13:32:31,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580660623] [2022-02-16 13:32:31,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:31,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-16 13:32:31,711 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:31,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-16 13:32:31,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-02-16 13:32:31,712 INFO L87 Difference]: Start difference. First operand 43 states and 98 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:31,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:31,777 INFO L93 Difference]: Finished difference Result 113 states and 196 transitions. [2022-02-16 13:32:31,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:32:31,778 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:32:31,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:31,778 INFO L225 Difference]: With dead ends: 113 [2022-02-16 13:32:31,778 INFO L226 Difference]: Without dead ends: 113 [2022-02-16 13:32:31,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-02-16 13:32:31,779 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 41 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:31,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 40 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:32:31,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-02-16 13:32:31,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 49. [2022-02-16 13:32:31,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.5) internal successors, (120), 48 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:31,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 120 transitions. [2022-02-16 13:32:31,782 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 120 transitions. Word has length 14 [2022-02-16 13:32:31,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:31,782 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 120 transitions. [2022-02-16 13:32:31,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:31,782 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 120 transitions. [2022-02-16 13:32:31,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:32:31,783 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:31,783 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:31,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:31,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:31,983 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:31,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:31,983 INFO L85 PathProgramCache]: Analyzing trace with hash -403903977, now seen corresponding path program 15 times [2022-02-16 13:32:31,983 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:31,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415490119] [2022-02-16 13:32:31,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:31,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:31,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:32,040 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:32,040 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:32,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415490119] [2022-02-16 13:32:32,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415490119] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:32,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236304190] [2022-02-16 13:32:32,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:32:32,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:32,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:32,042 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:32,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-16 13:32:32,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:32:32,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:32,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:32:32,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:32,192 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:32,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2022-02-16 13:32:32,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:32,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:32,352 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:32,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 35 treesize of output 150 [2022-02-16 13:32:32,862 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:32,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236304190] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:32,862 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:32,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-02-16 13:32:32,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775084761] [2022-02-16 13:32:32,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:32,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:32:32,863 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:32,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:32:32,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:32:32,863 INFO L87 Difference]: Start difference. First operand 49 states and 120 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:33,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:33,036 INFO L93 Difference]: Finished difference Result 71 states and 151 transitions. [2022-02-16 13:32:33,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 13:32:33,036 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:32:33,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:33,037 INFO L225 Difference]: With dead ends: 71 [2022-02-16 13:32:33,037 INFO L226 Difference]: Without dead ends: 67 [2022-02-16 13:32:33,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:32:33,038 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:33,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 34 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:32:33,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-02-16 13:32:33,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2022-02-16 13:32:33,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.489795918367347) internal successors, (122), 49 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:33,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2022-02-16 13:32:33,040 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 14 [2022-02-16 13:32:33,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:33,041 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2022-02-16 13:32:33,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:33,041 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2022-02-16 13:32:33,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:32:33,041 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:33,041 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:33,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:33,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:33,251 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:33,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:33,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1214767379, now seen corresponding path program 16 times [2022-02-16 13:32:33,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:33,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257010711] [2022-02-16 13:32:33,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:33,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:33,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:33,304 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:33,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257010711] [2022-02-16 13:32:33,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257010711] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:33,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194479866] [2022-02-16 13:32:33,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:32:33,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:33,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:33,305 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:33,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-16 13:32:33,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:32:33,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:33,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:32:33,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:33,452 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:33,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 50 [2022-02-16 13:32:33,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:33,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:33,657 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:33,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 35 treesize of output 150 [2022-02-16 13:32:34,737 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:34,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194479866] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:34,738 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:34,738 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-02-16 13:32:34,738 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037527662] [2022-02-16 13:32:34,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:34,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:32:34,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:34,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:32:34,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:32:34,739 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:34,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:34,896 INFO L93 Difference]: Finished difference Result 64 states and 142 transitions. [2022-02-16 13:32:34,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:32:34,896 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:32:34,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:34,897 INFO L225 Difference]: With dead ends: 64 [2022-02-16 13:32:34,897 INFO L226 Difference]: Without dead ends: 54 [2022-02-16 13:32:34,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:32:34,898 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 30 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:34,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 30 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:32:34,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-02-16 13:32:34,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2022-02-16 13:32:34,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.4693877551020407) internal successors, (121), 49 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:34,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2022-02-16 13:32:34,900 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 14 [2022-02-16 13:32:34,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:34,900 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2022-02-16 13:32:34,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:34,901 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2022-02-16 13:32:34,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:32:34,901 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:34,901 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:34,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:35,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-02-16 13:32:35,111 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:35,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:35,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1207036981, now seen corresponding path program 17 times [2022-02-16 13:32:35,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:35,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919004477] [2022-02-16 13:32:35,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:35,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:35,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:35,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:35,166 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:35,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919004477] [2022-02-16 13:32:35,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919004477] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:35,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506946550] [2022-02-16 13:32:35,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:32:35,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:35,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:35,167 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:35,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-16 13:32:35,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:32:35,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:35,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:32:35,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:35,322 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:35,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2022-02-16 13:32:35,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:35,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:35,470 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:35,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 35 treesize of output 150 [2022-02-16 13:32:36,095 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:36,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506946550] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:36,095 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:36,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-02-16 13:32:36,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467001762] [2022-02-16 13:32:36,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:36,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:32:36,096 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:36,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:32:36,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:32:36,096 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:36,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:36,221 INFO L93 Difference]: Finished difference Result 67 states and 139 transitions. [2022-02-16 13:32:36,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 13:32:36,221 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:32:36,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:36,222 INFO L225 Difference]: With dead ends: 67 [2022-02-16 13:32:36,222 INFO L226 Difference]: Without dead ends: 63 [2022-02-16 13:32:36,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:32:36,223 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:36,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 19 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:32:36,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-16 13:32:36,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 50. [2022-02-16 13:32:36,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.4693877551020407) internal successors, (121), 49 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:36,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2022-02-16 13:32:36,225 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 14 [2022-02-16 13:32:36,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:36,225 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2022-02-16 13:32:36,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:36,226 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2022-02-16 13:32:36,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:32:36,226 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:36,226 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:36,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:36,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-02-16 13:32:36,439 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:36,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:36,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1598525319, now seen corresponding path program 18 times [2022-02-16 13:32:36,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:36,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721638687] [2022-02-16 13:32:36,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:36,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:36,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:36,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:36,494 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:36,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721638687] [2022-02-16 13:32:36,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721638687] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:36,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307190602] [2022-02-16 13:32:36,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:32:36,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:36,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:36,495 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:36,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-16 13:32:36,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:32:36,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:36,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:32:36,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:36,639 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:36,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2022-02-16 13:32:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:36,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:36,795 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:36,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 35 treesize of output 150 [2022-02-16 13:32:38,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:38,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307190602] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:38,094 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:38,094 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-02-16 13:32:38,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152946745] [2022-02-16 13:32:38,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:38,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:32:38,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:38,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:32:38,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:32:38,096 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:38,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:38,314 INFO L93 Difference]: Finished difference Result 90 states and 179 transitions. [2022-02-16 13:32:38,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:32:38,314 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:32:38,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:38,315 INFO L225 Difference]: With dead ends: 90 [2022-02-16 13:32:38,315 INFO L226 Difference]: Without dead ends: 79 [2022-02-16 13:32:38,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:32:38,315 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 28 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:38,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 43 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:32:38,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-02-16 13:32:38,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 50. [2022-02-16 13:32:38,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.4285714285714284) internal successors, (119), 49 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:38,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 119 transitions. [2022-02-16 13:32:38,318 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 119 transitions. Word has length 14 [2022-02-16 13:32:38,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:38,318 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 119 transitions. [2022-02-16 13:32:38,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:38,318 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 119 transitions. [2022-02-16 13:32:38,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:32:38,318 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:38,318 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:38,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-02-16 13:32:38,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-02-16 13:32:38,523 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:38,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:38,524 INFO L85 PathProgramCache]: Analyzing trace with hash -385670475, now seen corresponding path program 19 times [2022-02-16 13:32:38,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:38,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053733351] [2022-02-16 13:32:38,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:38,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:38,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:38,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:38,580 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:38,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053733351] [2022-02-16 13:32:38,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053733351] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:38,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045872940] [2022-02-16 13:32:38,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:32:38,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:38,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:38,582 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:38,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-16 13:32:38,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:38,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:32:38,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:38,727 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:38,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 50 [2022-02-16 13:32:38,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:38,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:38,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:38,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 35 treesize of output 150 [2022-02-16 13:32:39,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:39,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045872940] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:39,670 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:39,670 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-02-16 13:32:39,670 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720919721] [2022-02-16 13:32:39,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:39,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:32:39,671 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:39,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:32:39,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:32:39,671 INFO L87 Difference]: Start difference. First operand 50 states and 119 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:39,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:39,787 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2022-02-16 13:32:39,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:32:39,787 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:32:39,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:39,788 INFO L225 Difference]: With dead ends: 60 [2022-02-16 13:32:39,788 INFO L226 Difference]: Without dead ends: 56 [2022-02-16 13:32:39,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:32:39,789 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:39,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 20 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:32:39,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-16 13:32:39,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2022-02-16 13:32:39,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.46) internal successors, (123), 50 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:39,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 123 transitions. [2022-02-16 13:32:39,791 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 123 transitions. Word has length 14 [2022-02-16 13:32:39,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:39,791 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 123 transitions. [2022-02-16 13:32:39,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:39,791 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 123 transitions. [2022-02-16 13:32:39,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:32:39,792 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:39,792 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:39,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:40,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:40,003 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:40,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:40,004 INFO L85 PathProgramCache]: Analyzing trace with hash -393400873, now seen corresponding path program 20 times [2022-02-16 13:32:40,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:40,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200548847] [2022-02-16 13:32:40,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:40,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:40,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:40,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:40,061 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:40,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200548847] [2022-02-16 13:32:40,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200548847] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:40,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279087153] [2022-02-16 13:32:40,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:32:40,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:40,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:40,062 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:40,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-16 13:32:40,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:32:40,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:40,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:32:40,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:40,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:40,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2022-02-16 13:32:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:40,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:40,371 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:40,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 35 treesize of output 150 [2022-02-16 13:32:41,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:41,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279087153] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:41,421 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:41,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-02-16 13:32:41,421 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865650028] [2022-02-16 13:32:41,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:41,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:32:41,421 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:41,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:32:41,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:32:41,422 INFO L87 Difference]: Start difference. First operand 51 states and 123 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:41,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:41,507 INFO L93 Difference]: Finished difference Result 67 states and 141 transitions. [2022-02-16 13:32:41,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-16 13:32:41,508 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:32:41,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:41,508 INFO L225 Difference]: With dead ends: 67 [2022-02-16 13:32:41,508 INFO L226 Difference]: Without dead ends: 63 [2022-02-16 13:32:41,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:32:41,509 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:41,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 28 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:32:41,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-16 13:32:41,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2022-02-16 13:32:41,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.46) internal successors, (123), 50 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:41,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 123 transitions. [2022-02-16 13:32:41,511 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 123 transitions. Word has length 14 [2022-02-16 13:32:41,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:41,511 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 123 transitions. [2022-02-16 13:32:41,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:41,511 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 123 transitions. [2022-02-16 13:32:41,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:32:41,512 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:41,512 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:41,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-02-16 13:32:41,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-02-16 13:32:41,727 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:41,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:41,728 INFO L85 PathProgramCache]: Analyzing trace with hash 2101842358, now seen corresponding path program 21 times [2022-02-16 13:32:41,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:41,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975559877] [2022-02-16 13:32:41,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:41,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:41,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:41,760 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:41,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975559877] [2022-02-16 13:32:41,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975559877] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:41,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043141685] [2022-02-16 13:32:41,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:32:41,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:41,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:41,761 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:41,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-16 13:32:41,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:32:41,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:41,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-16 13:32:41,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:41,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:41,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:41,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:41,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043141685] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:41,839 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:41,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-02-16 13:32:41,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854495873] [2022-02-16 13:32:41,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:41,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-16 13:32:41,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:41,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-16 13:32:41,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-16 13:32:41,840 INFO L87 Difference]: Start difference. First operand 51 states and 123 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:41,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:41,913 INFO L93 Difference]: Finished difference Result 116 states and 215 transitions. [2022-02-16 13:32:41,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:32:41,914 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:32:41,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:41,914 INFO L225 Difference]: With dead ends: 116 [2022-02-16 13:32:41,914 INFO L226 Difference]: Without dead ends: 116 [2022-02-16 13:32:41,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:32:41,915 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 47 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:41,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 49 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:32:41,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-16 13:32:41,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 51. [2022-02-16 13:32:41,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.5) internal successors, (125), 50 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:41,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2022-02-16 13:32:41,918 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2022-02-16 13:32:41,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:41,918 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2022-02-16 13:32:41,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:41,918 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2022-02-16 13:32:41,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:32:41,918 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:41,918 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:41,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-02-16 13:32:42,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-02-16 13:32:42,131 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:42,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:42,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1096004123, now seen corresponding path program 22 times [2022-02-16 13:32:42,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:42,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403580998] [2022-02-16 13:32:42,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:42,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:42,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:42,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:42,208 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:42,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403580998] [2022-02-16 13:32:42,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403580998] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:42,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711411950] [2022-02-16 13:32:42,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:32:42,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:42,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:42,229 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:42,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-16 13:32:42,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:32:42,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:42,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:32:42,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:42,387 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:42,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2022-02-16 13:32:42,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:42,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:42,525 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:42,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 35 treesize of output 150 [2022-02-16 13:32:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:43,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711411950] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:43,451 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:43,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-02-16 13:32:43,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627091496] [2022-02-16 13:32:43,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:43,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:32:43,452 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:43,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:32:43,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:32:43,452 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:43,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:43,610 INFO L93 Difference]: Finished difference Result 83 states and 159 transitions. [2022-02-16 13:32:43,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-16 13:32:43,611 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:32:43,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:43,611 INFO L225 Difference]: With dead ends: 83 [2022-02-16 13:32:43,611 INFO L226 Difference]: Without dead ends: 72 [2022-02-16 13:32:43,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:32:43,612 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 31 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:43,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 36 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:32:43,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-02-16 13:32:43,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 51. [2022-02-16 13:32:43,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.48) internal successors, (124), 50 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:43,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 124 transitions. [2022-02-16 13:32:43,614 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 124 transitions. Word has length 14 [2022-02-16 13:32:43,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:43,614 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 124 transitions. [2022-02-16 13:32:43,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:43,614 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 124 transitions. [2022-02-16 13:32:43,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-16 13:32:43,614 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:43,614 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:43,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-02-16 13:32:43,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:43,815 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:43,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:43,815 INFO L85 PathProgramCache]: Analyzing trace with hash 22918743, now seen corresponding path program 23 times [2022-02-16 13:32:43,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:43,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445881156] [2022-02-16 13:32:43,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:43,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:43,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:43,881 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:43,881 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:43,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445881156] [2022-02-16 13:32:43,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445881156] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:43,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411242777] [2022-02-16 13:32:43,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:32:43,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:43,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:43,882 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:43,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-16 13:32:43,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:32:43,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:43,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:32:43,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:44,050 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:44,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2022-02-16 13:32:44,063 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:44,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:44,163 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:44,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 35 treesize of output 150 [2022-02-16 13:32:44,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:44,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411242777] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:44,900 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:44,900 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-16 13:32:44,900 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250446683] [2022-02-16 13:32:44,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:44,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:32:44,900 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:44,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:32:44,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:32:44,900 INFO L87 Difference]: Start difference. First operand 51 states and 124 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:45,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:45,120 INFO L93 Difference]: Finished difference Result 90 states and 181 transitions. [2022-02-16 13:32:45,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 13:32:45,120 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-16 13:32:45,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:45,121 INFO L225 Difference]: With dead ends: 90 [2022-02-16 13:32:45,121 INFO L226 Difference]: Without dead ends: 86 [2022-02-16 13:32:45,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:32:45,122 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:45,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 57 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:32:45,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-16 13:32:45,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 52. [2022-02-16 13:32:45,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.450980392156863) internal successors, (125), 51 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:45,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 125 transitions. [2022-02-16 13:32:45,124 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 125 transitions. Word has length 14 [2022-02-16 13:32:45,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:45,124 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 125 transitions. [2022-02-16 13:32:45,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:45,124 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 125 transitions. [2022-02-16 13:32:45,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:32:45,124 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:45,124 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:45,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-02-16 13:32:45,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:45,327 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:45,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:45,327 INFO L85 PathProgramCache]: Analyzing trace with hash 877381135, now seen corresponding path program 24 times [2022-02-16 13:32:45,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:45,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421197491] [2022-02-16 13:32:45,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:45,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:45,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:45,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:45,360 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:45,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421197491] [2022-02-16 13:32:45,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421197491] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:45,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942027386] [2022-02-16 13:32:45,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:32:45,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:45,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:45,361 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:45,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-16 13:32:45,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:32:45,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:45,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:32:45,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:45,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:45,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:45,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942027386] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:45,430 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:45,430 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-02-16 13:32:45,430 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507115799] [2022-02-16 13:32:45,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:45,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-16 13:32:45,430 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:45,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-16 13:32:45,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-02-16 13:32:45,431 INFO L87 Difference]: Start difference. First operand 52 states and 125 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:45,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:45,526 INFO L93 Difference]: Finished difference Result 92 states and 166 transitions. [2022-02-16 13:32:45,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 13:32:45,527 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:32:45,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:45,527 INFO L225 Difference]: With dead ends: 92 [2022-02-16 13:32:45,527 INFO L226 Difference]: Without dead ends: 90 [2022-02-16 13:32:45,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:32:45,528 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 45 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:45,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 40 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:32:45,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-02-16 13:32:45,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 52. [2022-02-16 13:32:45,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.3529411764705883) internal successors, (120), 51 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:45,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 120 transitions. [2022-02-16 13:32:45,531 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 120 transitions. Word has length 15 [2022-02-16 13:32:45,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:45,531 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 120 transitions. [2022-02-16 13:32:45,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:45,532 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 120 transitions. [2022-02-16 13:32:45,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:32:45,534 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:45,534 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:45,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:45,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:45,743 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:45,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:45,744 INFO L85 PathProgramCache]: Analyzing trace with hash -120726702, now seen corresponding path program 25 times [2022-02-16 13:32:45,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:45,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30808582] [2022-02-16 13:32:45,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:45,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:45,780 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:45,781 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:45,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30808582] [2022-02-16 13:32:45,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30808582] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:45,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057689747] [2022-02-16 13:32:45,781 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:32:45,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:45,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:45,782 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:45,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-16 13:32:45,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:45,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:32:45,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:45,829 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:45,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:45,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057689747] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:45,856 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:45,856 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-02-16 13:32:45,856 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977255870] [2022-02-16 13:32:45,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:45,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-16 13:32:45,856 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:45,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-16 13:32:45,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-16 13:32:45,856 INFO L87 Difference]: Start difference. First operand 52 states and 120 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:45,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:45,927 INFO L93 Difference]: Finished difference Result 109 states and 202 transitions. [2022-02-16 13:32:45,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:32:45,927 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:32:45,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:45,928 INFO L225 Difference]: With dead ends: 109 [2022-02-16 13:32:45,928 INFO L226 Difference]: Without dead ends: 108 [2022-02-16 13:32:45,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-02-16 13:32:45,928 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 38 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:45,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 52 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:32:45,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-02-16 13:32:45,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 60. [2022-02-16 13:32:45,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.4915254237288136) internal successors, (147), 59 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:45,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2022-02-16 13:32:45,931 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 15 [2022-02-16 13:32:45,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:45,931 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2022-02-16 13:32:45,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:45,931 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2022-02-16 13:32:45,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:32:45,931 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:45,931 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:45,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-02-16 13:32:46,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:46,139 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:46,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:46,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1968108590, now seen corresponding path program 26 times [2022-02-16 13:32:46,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:46,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454669676] [2022-02-16 13:32:46,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:46,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:46,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:46,171 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:46,172 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:46,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454669676] [2022-02-16 13:32:46,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454669676] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:46,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241149560] [2022-02-16 13:32:46,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:32:46,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:46,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:46,173 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:46,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-16 13:32:46,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:32:46,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:46,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:32:46,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:46,224 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:46,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:46,256 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:46,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241149560] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:46,256 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:46,256 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-02-16 13:32:46,256 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526081625] [2022-02-16 13:32:46,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:46,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-16 13:32:46,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:46,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-16 13:32:46,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-16 13:32:46,257 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:46,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:46,342 INFO L93 Difference]: Finished difference Result 76 states and 163 transitions. [2022-02-16 13:32:46,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:32:46,342 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:32:46,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:46,342 INFO L225 Difference]: With dead ends: 76 [2022-02-16 13:32:46,343 INFO L226 Difference]: Without dead ends: 75 [2022-02-16 13:32:46,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-02-16 13:32:46,343 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:46,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 34 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:32:46,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-16 13:32:46,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2022-02-16 13:32:46,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.45) internal successors, (147), 60 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:46,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2022-02-16 13:32:46,346 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 15 [2022-02-16 13:32:46,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:46,346 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2022-02-16 13:32:46,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:46,346 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2022-02-16 13:32:46,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:32:46,346 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:46,346 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:46,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:46,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-02-16 13:32:46,555 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:46,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:46,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1132237364, now seen corresponding path program 27 times [2022-02-16 13:32:46,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:46,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353365623] [2022-02-16 13:32:46,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:46,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:46,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:46,594 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:46,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:46,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353365623] [2022-02-16 13:32:46,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353365623] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:46,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931071463] [2022-02-16 13:32:46,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:32:46,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:46,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:46,596 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:46,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-16 13:32:46,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:32:46,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:46,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:32:46,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:46,649 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:46,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:46,673 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:46,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931071463] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:46,673 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:46,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-02-16 13:32:46,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556427772] [2022-02-16 13:32:46,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:46,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-16 13:32:46,674 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:46,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-16 13:32:46,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-02-16 13:32:46,674 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:46,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:46,734 INFO L93 Difference]: Finished difference Result 86 states and 189 transitions. [2022-02-16 13:32:46,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:32:46,735 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:32:46,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:46,735 INFO L225 Difference]: With dead ends: 86 [2022-02-16 13:32:46,735 INFO L226 Difference]: Without dead ends: 84 [2022-02-16 13:32:46,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-02-16 13:32:46,736 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 22 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:46,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 13 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:32:46,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-02-16 13:32:46,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 61. [2022-02-16 13:32:46,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.433333333333333) internal successors, (146), 60 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:46,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 146 transitions. [2022-02-16 13:32:46,738 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 146 transitions. Word has length 15 [2022-02-16 13:32:46,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:46,738 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 146 transitions. [2022-02-16 13:32:46,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:46,739 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 146 transitions. [2022-02-16 13:32:46,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:32:46,739 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:46,739 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:46,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-02-16 13:32:46,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:46,943 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:46,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:46,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1917678061, now seen corresponding path program 28 times [2022-02-16 13:32:46,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:46,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068572902] [2022-02-16 13:32:46,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:46,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:46,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:46,972 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:46,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068572902] [2022-02-16 13:32:46,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068572902] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:46,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185410213] [2022-02-16 13:32:46,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:32:46,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:46,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:46,973 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:46,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-16 13:32:46,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:32:46,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:46,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:32:46,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:47,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:32:47,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:47,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:32:47,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185410213] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:47,037 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:47,037 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-16 13:32:47,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742040302] [2022-02-16 13:32:47,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:47,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-16 13:32:47,037 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:47,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-16 13:32:47,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-02-16 13:32:47,038 INFO L87 Difference]: Start difference. First operand 61 states and 146 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:47,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:47,081 INFO L93 Difference]: Finished difference Result 83 states and 180 transitions. [2022-02-16 13:32:47,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:32:47,082 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:32:47,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:47,082 INFO L225 Difference]: With dead ends: 83 [2022-02-16 13:32:47,082 INFO L226 Difference]: Without dead ends: 82 [2022-02-16 13:32:47,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-02-16 13:32:47,083 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 15 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:47,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 16 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:32:47,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-02-16 13:32:47,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 67. [2022-02-16 13:32:47,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.484848484848485) internal successors, (164), 66 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:47,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 164 transitions. [2022-02-16 13:32:47,085 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 164 transitions. Word has length 15 [2022-02-16 13:32:47,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:47,085 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 164 transitions. [2022-02-16 13:32:47,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:47,086 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 164 transitions. [2022-02-16 13:32:47,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:32:47,086 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:47,086 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:47,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:47,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:47,299 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:47,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:47,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1949875088, now seen corresponding path program 29 times [2022-02-16 13:32:47,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:47,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316134398] [2022-02-16 13:32:47,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:47,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:47,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:47,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:47,331 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:47,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316134398] [2022-02-16 13:32:47,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316134398] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:47,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907399423] [2022-02-16 13:32:47,332 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:32:47,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:47,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:47,333 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:47,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-16 13:32:47,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:32:47,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:47,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:32:47,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:47,376 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:32:47,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:47,407 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:32:47,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907399423] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:47,407 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:47,407 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-16 13:32:47,407 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640775304] [2022-02-16 13:32:47,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:47,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-16 13:32:47,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:47,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-16 13:32:47,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-02-16 13:32:47,409 INFO L87 Difference]: Start difference. First operand 67 states and 164 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:47,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:47,451 INFO L93 Difference]: Finished difference Result 126 states and 269 transitions. [2022-02-16 13:32:47,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-16 13:32:47,451 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:32:47,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:47,452 INFO L225 Difference]: With dead ends: 126 [2022-02-16 13:32:47,452 INFO L226 Difference]: Without dead ends: 126 [2022-02-16 13:32:47,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-16 13:32:47,452 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:47,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 52 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:32:47,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-02-16 13:32:47,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 75. [2022-02-16 13:32:47,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.6216216216216215) internal successors, (194), 74 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:47,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 194 transitions. [2022-02-16 13:32:47,455 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 194 transitions. Word has length 15 [2022-02-16 13:32:47,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:47,455 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 194 transitions. [2022-02-16 13:32:47,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:47,455 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 194 transitions. [2022-02-16 13:32:47,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:32:47,455 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:47,455 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:47,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-02-16 13:32:47,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-02-16 13:32:47,656 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:47,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:47,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1541285870, now seen corresponding path program 30 times [2022-02-16 13:32:47,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:47,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131581939] [2022-02-16 13:32:47,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:47,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:47,694 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:47,695 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:47,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131581939] [2022-02-16 13:32:47,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131581939] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:47,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131985253] [2022-02-16 13:32:47,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:32:47,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:47,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:47,696 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:47,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-16 13:32:47,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:32:47,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:47,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:32:47,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:47,755 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:47,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:47,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:47,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131985253] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:47,789 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:47,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-02-16 13:32:47,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769029230] [2022-02-16 13:32:47,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:47,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-16 13:32:47,791 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:47,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-16 13:32:47,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-16 13:32:47,791 INFO L87 Difference]: Start difference. First operand 75 states and 194 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:47,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:47,873 INFO L93 Difference]: Finished difference Result 117 states and 259 transitions. [2022-02-16 13:32:47,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-16 13:32:47,874 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:32:47,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:47,874 INFO L225 Difference]: With dead ends: 117 [2022-02-16 13:32:47,875 INFO L226 Difference]: Without dead ends: 114 [2022-02-16 13:32:47,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-02-16 13:32:47,875 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 56 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:47,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 16 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:32:47,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-02-16 13:32:47,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 77. [2022-02-16 13:32:47,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.5921052631578947) internal successors, (197), 76 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:47,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 197 transitions. [2022-02-16 13:32:47,878 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 197 transitions. Word has length 15 [2022-02-16 13:32:47,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:47,878 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 197 transitions. [2022-02-16 13:32:47,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:47,878 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 197 transitions. [2022-02-16 13:32:47,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:32:47,879 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:47,879 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:47,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:48,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-02-16 13:32:48,088 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:48,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:48,088 INFO L85 PathProgramCache]: Analyzing trace with hash 8356017, now seen corresponding path program 31 times [2022-02-16 13:32:48,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:48,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895828022] [2022-02-16 13:32:48,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:48,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:48,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:48,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:48,126 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:48,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895828022] [2022-02-16 13:32:48,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895828022] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:48,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495788688] [2022-02-16 13:32:48,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:32:48,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:48,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:48,127 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:48,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-16 13:32:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:48,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:32:48,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:48,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:48,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:48,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:48,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495788688] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:48,205 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:48,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-02-16 13:32:48,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374448000] [2022-02-16 13:32:48,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:48,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-16 13:32:48,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:48,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-16 13:32:48,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-16 13:32:48,206 INFO L87 Difference]: Start difference. First operand 77 states and 197 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:48,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:48,271 INFO L93 Difference]: Finished difference Result 104 states and 224 transitions. [2022-02-16 13:32:48,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:32:48,271 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:32:48,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:48,272 INFO L225 Difference]: With dead ends: 104 [2022-02-16 13:32:48,272 INFO L226 Difference]: Without dead ends: 103 [2022-02-16 13:32:48,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-02-16 13:32:48,272 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:48,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 25 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:32:48,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-02-16 13:32:48,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 71. [2022-02-16 13:32:48,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.5285714285714285) internal successors, (177), 70 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:48,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2022-02-16 13:32:48,275 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 15 [2022-02-16 13:32:48,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:48,275 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2022-02-16 13:32:48,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:48,275 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2022-02-16 13:32:48,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:32:48,276 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:48,276 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:48,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-02-16 13:32:48,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-02-16 13:32:48,479 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:48,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:48,480 INFO L85 PathProgramCache]: Analyzing trace with hash -23841010, now seen corresponding path program 32 times [2022-02-16 13:32:48,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:48,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236164787] [2022-02-16 13:32:48,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:48,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:48,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:48,513 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:48,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236164787] [2022-02-16 13:32:48,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236164787] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:48,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360229734] [2022-02-16 13:32:48,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:32:48,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:48,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:48,514 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:48,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-16 13:32:48,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:32:48,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:48,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:32:48,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:48,565 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:48,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:48,600 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:48,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360229734] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:48,600 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:48,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-02-16 13:32:48,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273356831] [2022-02-16 13:32:48,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:48,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-16 13:32:48,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:48,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-16 13:32:48,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-16 13:32:48,601 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:48,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:48,651 INFO L93 Difference]: Finished difference Result 142 states and 293 transitions. [2022-02-16 13:32:48,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-16 13:32:48,651 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:32:48,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:48,652 INFO L225 Difference]: With dead ends: 142 [2022-02-16 13:32:48,652 INFO L226 Difference]: Without dead ends: 142 [2022-02-16 13:32:48,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-02-16 13:32:48,654 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 53 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:48,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 28 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:32:48,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-02-16 13:32:48,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 85. [2022-02-16 13:32:48,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7261904761904763) internal successors, (229), 84 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:48,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 229 transitions. [2022-02-16 13:32:48,658 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 229 transitions. Word has length 15 [2022-02-16 13:32:48,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:48,658 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 229 transitions. [2022-02-16 13:32:48,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:48,658 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 229 transitions. [2022-02-16 13:32:48,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:32:48,659 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:48,659 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:48,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:48,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-02-16 13:32:48,859 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:48,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:48,860 INFO L85 PathProgramCache]: Analyzing trace with hash -31571408, now seen corresponding path program 33 times [2022-02-16 13:32:48,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:48,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562321210] [2022-02-16 13:32:48,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:48,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:48,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:48,896 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:48,896 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:48,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562321210] [2022-02-16 13:32:48,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562321210] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:48,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241818163] [2022-02-16 13:32:48,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:32:48,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:48,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:48,898 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:48,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-16 13:32:48,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:32:48,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:48,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:32:48,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:48,945 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:48,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:48,981 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:48,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241818163] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:48,982 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:48,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-02-16 13:32:48,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17233159] [2022-02-16 13:32:48,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:48,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-16 13:32:48,982 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:48,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-16 13:32:48,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-16 13:32:48,985 INFO L87 Difference]: Start difference. First operand 85 states and 229 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:49,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:49,058 INFO L93 Difference]: Finished difference Result 134 states and 283 transitions. [2022-02-16 13:32:49,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:32:49,059 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:32:49,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:49,059 INFO L225 Difference]: With dead ends: 134 [2022-02-16 13:32:49,059 INFO L226 Difference]: Without dead ends: 133 [2022-02-16 13:32:49,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-02-16 13:32:49,060 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 46 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:49,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 25 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:32:49,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-02-16 13:32:49,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 85. [2022-02-16 13:32:49,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:49,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2022-02-16 13:32:49,063 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2022-02-16 13:32:49,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:49,063 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2022-02-16 13:32:49,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:49,064 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2022-02-16 13:32:49,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:32:49,064 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:49,064 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:49,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:49,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:49,286 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:49,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:49,287 INFO L85 PathProgramCache]: Analyzing trace with hash 384748208, now seen corresponding path program 34 times [2022-02-16 13:32:49,287 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:49,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055098872] [2022-02-16 13:32:49,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:49,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:49,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:49,323 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:49,323 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:49,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055098872] [2022-02-16 13:32:49,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055098872] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:49,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786424266] [2022-02-16 13:32:49,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:32:49,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:49,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:49,324 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:49,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-16 13:32:49,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:32:49,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:49,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:32:49,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:49,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:49,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:49,395 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:49,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786424266] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:49,395 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:49,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-02-16 13:32:49,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873000435] [2022-02-16 13:32:49,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:49,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-16 13:32:49,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:49,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-16 13:32:49,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-02-16 13:32:49,396 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:49,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:49,464 INFO L93 Difference]: Finished difference Result 140 states and 324 transitions. [2022-02-16 13:32:49,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:32:49,464 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:32:49,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:49,465 INFO L225 Difference]: With dead ends: 140 [2022-02-16 13:32:49,465 INFO L226 Difference]: Without dead ends: 137 [2022-02-16 13:32:49,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-02-16 13:32:49,466 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 40 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:49,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 22 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:32:49,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-02-16 13:32:49,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 92. [2022-02-16 13:32:49,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.78021978021978) internal successors, (253), 91 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:49,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 253 transitions. [2022-02-16 13:32:49,469 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 253 transitions. Word has length 15 [2022-02-16 13:32:49,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:49,469 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 253 transitions. [2022-02-16 13:32:49,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:49,470 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 253 transitions. [2022-02-16 13:32:49,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:32:49,470 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:49,470 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:49,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:49,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-02-16 13:32:49,687 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:49,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:49,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1820792369, now seen corresponding path program 35 times [2022-02-16 13:32:49,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:49,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692616781] [2022-02-16 13:32:49,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:49,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:49,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:49,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:49,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:49,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692616781] [2022-02-16 13:32:49,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692616781] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:49,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236584057] [2022-02-16 13:32:49,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:32:49,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:49,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:49,730 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:49,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-16 13:32:49,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:32:49,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:49,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:32:49,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:49,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:49,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:49,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236584057] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:49,817 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:49,817 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-02-16 13:32:49,817 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720109651] [2022-02-16 13:32:49,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:49,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-16 13:32:49,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:49,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-16 13:32:49,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-16 13:32:49,818 INFO L87 Difference]: Start difference. First operand 92 states and 253 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:49,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:49,894 INFO L93 Difference]: Finished difference Result 124 states and 316 transitions. [2022-02-16 13:32:49,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:32:49,895 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:32:49,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:49,896 INFO L225 Difference]: With dead ends: 124 [2022-02-16 13:32:49,896 INFO L226 Difference]: Without dead ends: 124 [2022-02-16 13:32:49,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:32:49,896 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:49,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 19 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:32:49,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-02-16 13:32:49,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 99. [2022-02-16 13:32:49,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.7857142857142856) internal successors, (273), 98 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:49,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 273 transitions. [2022-02-16 13:32:49,899 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 273 transitions. Word has length 15 [2022-02-16 13:32:49,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:49,900 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 273 transitions. [2022-02-16 13:32:49,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:49,900 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 273 transitions. [2022-02-16 13:32:49,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-16 13:32:49,900 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:49,900 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:49,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:50,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-02-16 13:32:50,119 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:50,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:50,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1478839796, now seen corresponding path program 36 times [2022-02-16 13:32:50,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:50,120 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686696318] [2022-02-16 13:32:50,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:50,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:50,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:50,149 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:50,149 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:50,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686696318] [2022-02-16 13:32:50,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686696318] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:50,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323542370] [2022-02-16 13:32:50,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:32:50,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:50,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:50,151 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:50,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-16 13:32:50,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:32:50,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:50,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-16 13:32:50,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:50,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:50,223 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:50,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323542370] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:50,223 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:50,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-02-16 13:32:50,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813480188] [2022-02-16 13:32:50,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:50,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-16 13:32:50,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:50,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-16 13:32:50,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-02-16 13:32:50,224 INFO L87 Difference]: Start difference. First operand 99 states and 273 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:50,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:50,266 INFO L93 Difference]: Finished difference Result 138 states and 343 transitions. [2022-02-16 13:32:50,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:32:50,267 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-16 13:32:50,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:50,267 INFO L225 Difference]: With dead ends: 138 [2022-02-16 13:32:50,267 INFO L226 Difference]: Without dead ends: 134 [2022-02-16 13:32:50,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-02-16 13:32:50,268 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 33 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:50,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 13 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:32:50,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-16 13:32:50,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 99. [2022-02-16 13:32:50,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.7755102040816326) internal successors, (272), 98 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:50,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 272 transitions. [2022-02-16 13:32:50,271 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 272 transitions. Word has length 15 [2022-02-16 13:32:50,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:50,271 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 272 transitions. [2022-02-16 13:32:50,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:50,271 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 272 transitions. [2022-02-16 13:32:50,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:32:50,272 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:50,272 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:50,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:50,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-02-16 13:32:50,487 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:50,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:50,487 INFO L85 PathProgramCache]: Analyzing trace with hash -368321612, now seen corresponding path program 37 times [2022-02-16 13:32:50,487 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:50,487 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364073412] [2022-02-16 13:32:50,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:50,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:50,571 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:50,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364073412] [2022-02-16 13:32:50,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364073412] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:50,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89820797] [2022-02-16 13:32:50,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:32:50,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:50,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:50,572 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:50,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-16 13:32:50,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:50,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:32:50,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:50,798 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:50,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 112 [2022-02-16 13:32:50,869 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:50,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:51,202 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:51,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-02-16 13:32:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:54,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89820797] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:32:54,469 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:32:54,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-02-16 13:32:54,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688049657] [2022-02-16 13:32:54,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:32:54,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 13:32:54,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:32:54,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 13:32:54,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:32:54,470 INFO L87 Difference]: Start difference. First operand 99 states and 272 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:54,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:32:54,796 INFO L93 Difference]: Finished difference Result 137 states and 345 transitions. [2022-02-16 13:32:54,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:32:54,796 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:32:54,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:32:54,797 INFO L225 Difference]: With dead ends: 137 [2022-02-16 13:32:54,797 INFO L226 Difference]: Without dead ends: 121 [2022-02-16 13:32:54,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2022-02-16 13:32:54,798 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 25 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:32:54,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 36 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:32:54,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-02-16 13:32:54,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 110. [2022-02-16 13:32:54,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.81651376146789) internal successors, (307), 109 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:54,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 307 transitions. [2022-02-16 13:32:54,802 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 307 transitions. Word has length 16 [2022-02-16 13:32:54,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:32:54,802 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 307 transitions. [2022-02-16 13:32:54,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:32:54,802 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 307 transitions. [2022-02-16 13:32:54,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:32:54,802 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:32:54,802 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:32:54,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-02-16 13:32:55,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:55,015 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:32:55,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:32:55,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1113352986, now seen corresponding path program 38 times [2022-02-16 13:32:55,016 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:32:55,016 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487085347] [2022-02-16 13:32:55,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:32:55,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:32:55,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:32:55,087 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:55,087 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:32:55,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487085347] [2022-02-16 13:32:55,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487085347] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:32:55,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283172187] [2022-02-16 13:32:55,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:32:55,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:32:55,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:32:55,089 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:32:55,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-16 13:32:55,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:32:55,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:32:55,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:32:55,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:32:55,278 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:55,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 112 [2022-02-16 13:32:55,627 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:32:55,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:32:55,957 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:32:55,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-02-16 13:33:07,236 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:33:07,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283172187] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:33:07,236 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:33:07,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-02-16 13:33:07,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942346044] [2022-02-16 13:33:07,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:33:07,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-16 13:33:07,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:33:07,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-16 13:33:07,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:33:07,237 INFO L87 Difference]: Start difference. First operand 110 states and 307 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:33:07,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:33:07,440 INFO L93 Difference]: Finished difference Result 142 states and 363 transitions. [2022-02-16 13:33:07,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 13:33:07,441 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:33:07,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:33:07,441 INFO L225 Difference]: With dead ends: 142 [2022-02-16 13:33:07,441 INFO L226 Difference]: Without dead ends: 134 [2022-02-16 13:33:07,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:33:07,442 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 23 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:33:07,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 28 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:33:07,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-16 13:33:07,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 110. [2022-02-16 13:33:07,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.81651376146789) internal successors, (307), 109 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:33:07,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 307 transitions. [2022-02-16 13:33:07,446 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 307 transitions. Word has length 16 [2022-02-16 13:33:07,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:33:07,446 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 307 transitions. [2022-02-16 13:33:07,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:33:07,446 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 307 transitions. [2022-02-16 13:33:07,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:33:07,446 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:33:07,446 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:33:07,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-02-16 13:33:07,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:33:07,655 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:33:07,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:33:07,656 INFO L85 PathProgramCache]: Analyzing trace with hash 892372852, now seen corresponding path program 39 times [2022-02-16 13:33:07,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:33:07,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121119802] [2022-02-16 13:33:07,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:33:07,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:33:07,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:33:07,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:33:07,730 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:33:07,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121119802] [2022-02-16 13:33:07,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121119802] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:33:07,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945060310] [2022-02-16 13:33:07,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:33:07,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:33:07,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:33:07,731 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:33:07,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-16 13:33:07,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:33:07,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:33:07,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:33:07,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:33:07,946 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:33:07,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 112 [2022-02-16 13:33:08,104 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:33:08,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:33:08,421 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:33:08,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-02-16 13:33:15,189 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:33:15,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945060310] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:33:15,190 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:33:15,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2022-02-16 13:33:15,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986425457] [2022-02-16 13:33:15,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:33:15,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:33:15,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:33:15,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:33:15,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:33:15,191 INFO L87 Difference]: Start difference. First operand 110 states and 307 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:33:15,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:33:15,395 INFO L93 Difference]: Finished difference Result 158 states and 422 transitions. [2022-02-16 13:33:15,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-16 13:33:15,395 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:33:15,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:33:15,396 INFO L225 Difference]: With dead ends: 158 [2022-02-16 13:33:15,396 INFO L226 Difference]: Without dead ends: 147 [2022-02-16 13:33:15,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:33:15,397 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 33 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:33:15,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 28 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:33:15,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-02-16 13:33:15,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 129. [2022-02-16 13:33:15,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.9296875) internal successors, (375), 128 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:33:15,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 375 transitions. [2022-02-16 13:33:15,401 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 375 transitions. Word has length 16 [2022-02-16 13:33:15,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:33:15,401 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 375 transitions. [2022-02-16 13:33:15,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:33:15,401 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 375 transitions. [2022-02-16 13:33:15,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:33:15,401 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:33:15,402 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:33:15,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-02-16 13:33:15,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-02-16 13:33:15,625 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:33:15,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:33:15,625 INFO L85 PathProgramCache]: Analyzing trace with hash -825970854, now seen corresponding path program 40 times [2022-02-16 13:33:15,625 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:33:15,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735224589] [2022-02-16 13:33:15,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:33:15,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:33:15,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:33:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:33:15,697 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:33:15,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735224589] [2022-02-16 13:33:15,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735224589] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:33:15,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860749833] [2022-02-16 13:33:15,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:33:15,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:33:15,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:33:15,698 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:33:15,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-16 13:33:15,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:33:15,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:33:15,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:33:15,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:33:15,886 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:33:15,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 112 [2022-02-16 13:33:16,173 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:33:16,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:33:16,482 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:33:16,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-02-16 13:33:24,362 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:33:24,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860749833] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:33:24,363 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:33:24,363 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-02-16 13:33:24,363 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397793742] [2022-02-16 13:33:24,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:33:24,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-16 13:33:24,363 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:33:24,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-16 13:33:24,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:33:24,363 INFO L87 Difference]: Start difference. First operand 129 states and 375 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:33:24,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:33:24,646 INFO L93 Difference]: Finished difference Result 181 states and 459 transitions. [2022-02-16 13:33:24,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-16 13:33:24,646 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:33:24,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:33:24,647 INFO L225 Difference]: With dead ends: 181 [2022-02-16 13:33:24,647 INFO L226 Difference]: Without dead ends: 167 [2022-02-16 13:33:24,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:33:24,648 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 51 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:33:24,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 54 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:33:24,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-02-16 13:33:24,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 128. [2022-02-16 13:33:24,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.8897637795275593) internal successors, (367), 127 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:33:24,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 367 transitions. [2022-02-16 13:33:24,652 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 367 transitions. Word has length 16 [2022-02-16 13:33:24,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:33:24,652 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 367 transitions. [2022-02-16 13:33:24,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:33:24,652 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 367 transitions. [2022-02-16 13:33:24,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:33:24,652 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:33:24,653 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:33:24,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-02-16 13:33:24,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-02-16 13:33:24,867 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:33:24,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:33:24,868 INFO L85 PathProgramCache]: Analyzing trace with hash 884642454, now seen corresponding path program 41 times [2022-02-16 13:33:24,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:33:24,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057314467] [2022-02-16 13:33:24,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:33:24,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:33:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:33:24,939 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:33:24,939 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:33:24,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057314467] [2022-02-16 13:33:24,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057314467] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:33:24,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265972717] [2022-02-16 13:33:24,940 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:33:24,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:33:24,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:33:24,942 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:33:24,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-16 13:33:24,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:33:24,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:33:24,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:33:24,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:33:25,142 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:33:25,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 41 treesize of output 107 [2022-02-16 13:33:25,326 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:33:25,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:33:25,599 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:33:25,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-02-16 13:33:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:33:36,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265972717] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:33:36,312 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:33:36,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-02-16 13:33:36,313 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683610396] [2022-02-16 13:33:36,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:33:36,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-16 13:33:36,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:33:36,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-16 13:33:36,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:33:36,313 INFO L87 Difference]: Start difference. First operand 128 states and 367 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:33:36,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:33:36,669 INFO L93 Difference]: Finished difference Result 197 states and 483 transitions. [2022-02-16 13:33:36,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 13:33:36,669 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:33:36,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:33:36,670 INFO L225 Difference]: With dead ends: 197 [2022-02-16 13:33:36,670 INFO L226 Difference]: Without dead ends: 184 [2022-02-16 13:33:36,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 13:33:36,671 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 48 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:33:36,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 64 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:33:36,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-02-16 13:33:36,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 129. [2022-02-16 13:33:36,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.890625) internal successors, (370), 128 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:33:36,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 370 transitions. [2022-02-16 13:33:36,675 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 370 transitions. Word has length 16 [2022-02-16 13:33:36,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:33:36,675 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 370 transitions. [2022-02-16 13:33:36,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:33:36,675 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 370 transitions. [2022-02-16 13:33:36,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:33:36,676 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:33:36,676 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:33:36,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-02-16 13:33:36,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-02-16 13:33:36,885 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:33:36,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:33:36,886 INFO L85 PathProgramCache]: Analyzing trace with hash 902875956, now seen corresponding path program 42 times [2022-02-16 13:33:36,886 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:33:36,886 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864844503] [2022-02-16 13:33:36,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:33:36,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:33:36,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:33:36,955 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:33:36,955 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:33:36,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864844503] [2022-02-16 13:33:36,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864844503] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:33:36,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576798199] [2022-02-16 13:33:36,955 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:33:36,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:33:36,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:33:36,957 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:33:36,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-16 13:33:36,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 13:33:36,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:33:36,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:33:36,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:33:37,176 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:33:37,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 112 [2022-02-16 13:33:37,280 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:33:37,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:33:37,602 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:33:37,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-02-16 13:33:44,339 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:33:44,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576798199] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:33:44,340 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:33:44,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2022-02-16 13:33:44,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358769987] [2022-02-16 13:33:44,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:33:44,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:33:44,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:33:44,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:33:44,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:33:44,341 INFO L87 Difference]: Start difference. First operand 129 states and 370 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:33:44,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:33:44,593 INFO L93 Difference]: Finished difference Result 180 states and 493 transitions. [2022-02-16 13:33:44,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-16 13:33:44,594 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:33:44,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:33:44,595 INFO L225 Difference]: With dead ends: 180 [2022-02-16 13:33:44,595 INFO L226 Difference]: Without dead ends: 168 [2022-02-16 13:33:44,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:33:44,595 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 35 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:33:44,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 35 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:33:44,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-02-16 13:33:44,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 150. [2022-02-16 13:33:44,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.9731543624161074) internal successors, (443), 149 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:33:44,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 443 transitions. [2022-02-16 13:33:44,600 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 443 transitions. Word has length 16 [2022-02-16 13:33:44,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:33:44,600 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 443 transitions. [2022-02-16 13:33:44,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:33:44,600 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 443 transitions. [2022-02-16 13:33:44,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:33:44,601 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:33:44,601 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:33:44,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-02-16 13:33:44,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:33:44,819 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:33:44,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:33:44,820 INFO L85 PathProgramCache]: Analyzing trace with hash -815467750, now seen corresponding path program 43 times [2022-02-16 13:33:44,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:33:44,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907413045] [2022-02-16 13:33:44,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:33:44,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:33:44,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:33:44,910 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:33:44,910 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:33:44,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907413045] [2022-02-16 13:33:44,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907413045] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:33:44,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41066729] [2022-02-16 13:33:44,910 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:33:44,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:33:44,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:33:44,912 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:33:44,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-16 13:33:44,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:33:44,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:33:44,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:33:45,121 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:33:45,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 112 [2022-02-16 13:33:45,400 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:33:45,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:33:45,692 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:33:45,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-02-16 13:34:04,679 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:34:04,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41066729] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:34:04,679 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:34:04,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-02-16 13:34:04,679 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602960634] [2022-02-16 13:34:04,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:34:04,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-16 13:34:04,680 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:34:04,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-16 13:34:04,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:34:04,680 INFO L87 Difference]: Start difference. First operand 150 states and 443 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:34:05,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:34:05,049 INFO L93 Difference]: Finished difference Result 216 states and 556 transitions. [2022-02-16 13:34:05,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-16 13:34:05,049 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:34:05,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:34:05,050 INFO L225 Difference]: With dead ends: 216 [2022-02-16 13:34:05,050 INFO L226 Difference]: Without dead ends: 197 [2022-02-16 13:34:05,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2022-02-16 13:34:05,051 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 48 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:34:05,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 58 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:34:05,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-02-16 13:34:05,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 151. [2022-02-16 13:34:05,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.966666666666667) internal successors, (445), 150 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:34:05,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 445 transitions. [2022-02-16 13:34:05,055 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 445 transitions. Word has length 16 [2022-02-16 13:34:05,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:34:05,055 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 445 transitions. [2022-02-16 13:34:05,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:34:05,056 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 445 transitions. [2022-02-16 13:34:05,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:34:05,056 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:34:05,056 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:34:05,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-02-16 13:34:05,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:34:05,271 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:34:05,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:34:05,271 INFO L85 PathProgramCache]: Analyzing trace with hash 895145558, now seen corresponding path program 44 times [2022-02-16 13:34:05,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:34:05,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964663378] [2022-02-16 13:34:05,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:34:05,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:34:05,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:34:05,360 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:34:05,360 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:34:05,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964663378] [2022-02-16 13:34:05,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964663378] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:34:05,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978473545] [2022-02-16 13:34:05,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:34:05,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:34:05,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:34:05,361 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:34:05,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-16 13:34:05,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:34:05,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:34:05,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:34:05,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:34:05,595 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:34:05,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 41 treesize of output 107 [2022-02-16 13:34:05,866 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:34:05,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:34:06,138 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:34:06,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-02-16 13:34:12,328 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:34:12,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978473545] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:34:12,329 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:34:12,329 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-16 13:34:12,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115263639] [2022-02-16 13:34:12,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:34:12,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-16 13:34:12,329 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:34:12,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-16 13:34:12,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:34:12,330 INFO L87 Difference]: Start difference. First operand 151 states and 445 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:34:12,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:34:12,762 INFO L93 Difference]: Finished difference Result 236 states and 584 transitions. [2022-02-16 13:34:12,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-16 13:34:12,762 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:34:12,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:34:12,763 INFO L225 Difference]: With dead ends: 236 [2022-02-16 13:34:12,763 INFO L226 Difference]: Without dead ends: 211 [2022-02-16 13:34:12,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=1125, Unknown=0, NotChecked=0, Total=1332 [2022-02-16 13:34:12,764 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 105 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:34:12,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 65 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:34:12,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-02-16 13:34:12,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 147. [2022-02-16 13:34:12,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.9383561643835616) internal successors, (429), 146 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:34:12,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 429 transitions. [2022-02-16 13:34:12,768 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 429 transitions. Word has length 16 [2022-02-16 13:34:12,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:34:12,768 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 429 transitions. [2022-02-16 13:34:12,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:34:12,768 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 429 transitions. [2022-02-16 13:34:12,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:34:12,769 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:34:12,769 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:34:12,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-02-16 13:34:12,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:34:12,975 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:34:12,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:34:12,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1910416742, now seen corresponding path program 45 times [2022-02-16 13:34:12,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:34:12,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008961598] [2022-02-16 13:34:12,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:34:12,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:34:12,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:34:13,052 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:34:13,052 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:34:13,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008961598] [2022-02-16 13:34:13,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008961598] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:34:13,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203006485] [2022-02-16 13:34:13,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:34:13,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:34:13,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:34:13,054 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:34:13,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-16 13:34:13,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:34:13,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:34:13,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:34:13,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:34:13,257 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:34:13,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 41 treesize of output 107 [2022-02-16 13:34:13,667 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:34:13,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:34:13,926 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:34:13,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-02-16 13:34:22,263 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:34:22,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203006485] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:34:22,264 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:34:22,264 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-16 13:34:22,264 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439097555] [2022-02-16 13:34:22,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:34:22,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-16 13:34:22,264 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:34:22,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-16 13:34:22,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:34:22,264 INFO L87 Difference]: Start difference. First operand 147 states and 429 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:34:22,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:34:22,537 INFO L93 Difference]: Finished difference Result 198 states and 535 transitions. [2022-02-16 13:34:22,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 13:34:22,537 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:34:22,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:34:22,538 INFO L225 Difference]: With dead ends: 198 [2022-02-16 13:34:22,538 INFO L226 Difference]: Without dead ends: 190 [2022-02-16 13:34:22,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=844, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:34:22,539 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:34:22,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 25 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:34:22,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-02-16 13:34:22,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 148. [2022-02-16 13:34:22,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.938775510204082) internal successors, (432), 147 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:34:22,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 432 transitions. [2022-02-16 13:34:22,542 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 432 transitions. Word has length 16 [2022-02-16 13:34:22,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:34:22,542 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 432 transitions. [2022-02-16 13:34:22,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:34:22,542 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 432 transitions. [2022-02-16 13:34:22,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:34:22,543 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:34:22,543 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:34:22,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-02-16 13:34:22,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-02-16 13:34:22,751 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:34:22,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:34:22,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1237346730, now seen corresponding path program 46 times [2022-02-16 13:34:22,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:34:22,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827563112] [2022-02-16 13:34:22,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:34:22,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:34:22,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:34:22,824 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:34:22,824 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:34:22,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827563112] [2022-02-16 13:34:22,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827563112] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:34:22,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245475437] [2022-02-16 13:34:22,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:34:22,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:34:22,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:34:22,825 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:34:22,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-16 13:34:22,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:34:22,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:34:22,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:34:22,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:34:23,037 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:34:23,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 112 [2022-02-16 13:34:23,215 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:34:23,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:34:23,523 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:34:23,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-02-16 13:34:43,545 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:34:43,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245475437] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:34:43,545 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:34:43,545 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2022-02-16 13:34:43,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654800781] [2022-02-16 13:34:43,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:34:43,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:34:43,546 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:34:43,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:34:43,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:34:43,546 INFO L87 Difference]: Start difference. First operand 148 states and 432 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:34:43,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:34:43,784 INFO L93 Difference]: Finished difference Result 167 states and 456 transitions. [2022-02-16 13:34:43,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-16 13:34:43,785 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:34:43,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:34:43,786 INFO L225 Difference]: With dead ends: 167 [2022-02-16 13:34:43,786 INFO L226 Difference]: Without dead ends: 155 [2022-02-16 13:34:43,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2022-02-16 13:34:43,786 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 25 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:34:43,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 31 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:34:43,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-02-16 13:34:43,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 148. [2022-02-16 13:34:43,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.931972789115646) internal successors, (431), 147 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:34:43,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 431 transitions. [2022-02-16 13:34:43,790 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 431 transitions. Word has length 16 [2022-02-16 13:34:43,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:34:43,790 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 431 transitions. [2022-02-16 13:34:43,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:34:43,790 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 431 transitions. [2022-02-16 13:34:43,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:34:43,791 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:34:43,791 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:34:43,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-02-16 13:34:44,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-02-16 13:34:44,007 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:34:44,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:34:44,008 INFO L85 PathProgramCache]: Analyzing trace with hash 15617336, now seen corresponding path program 47 times [2022-02-16 13:34:44,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:34:44,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691689720] [2022-02-16 13:34:44,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:34:44,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:34:44,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:34:44,088 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:34:44,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:34:44,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691689720] [2022-02-16 13:34:44,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691689720] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:34:44,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111794229] [2022-02-16 13:34:44,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:34:44,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:34:44,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:34:44,090 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:34:44,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-16 13:34:44,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:34:44,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:34:44,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:34:44,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:34:44,292 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:34:44,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 41 treesize of output 107 [2022-02-16 13:34:44,569 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:34:44,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:34:44,817 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:34:44,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-02-16 13:34:55,126 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:34:55,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111794229] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:34:55,126 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:34:55,126 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-16 13:34:55,127 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585235528] [2022-02-16 13:34:55,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:34:55,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-16 13:34:55,127 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:34:55,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-16 13:34:55,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:34:55,127 INFO L87 Difference]: Start difference. First operand 148 states and 431 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:34:55,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:34:55,465 INFO L93 Difference]: Finished difference Result 192 states and 515 transitions. [2022-02-16 13:34:55,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 13:34:55,465 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:34:55,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:34:55,466 INFO L225 Difference]: With dead ends: 192 [2022-02-16 13:34:55,466 INFO L226 Difference]: Without dead ends: 184 [2022-02-16 13:34:55,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=187, Invalid=1073, Unknown=0, NotChecked=0, Total=1260 [2022-02-16 13:34:55,466 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 21 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:34:55,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 27 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:34:55,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-02-16 13:34:55,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 148. [2022-02-16 13:34:55,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.931972789115646) internal successors, (431), 147 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:34:55,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 431 transitions. [2022-02-16 13:34:55,470 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 431 transitions. Word has length 16 [2022-02-16 13:34:55,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:34:55,470 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 431 transitions. [2022-02-16 13:34:55,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:34:55,470 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 431 transitions. [2022-02-16 13:34:55,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:34:55,471 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:34:55,471 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:34:55,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-02-16 13:34:55,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:34:55,687 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:34:55,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:34:55,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1228472180, now seen corresponding path program 48 times [2022-02-16 13:34:55,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:34:55,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471781691] [2022-02-16 13:34:55,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:34:55,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:34:55,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:34:55,764 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:34:55,765 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:34:55,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471781691] [2022-02-16 13:34:55,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471781691] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:34:55,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327862040] [2022-02-16 13:34:55,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:34:55,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:34:55,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:34:55,766 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:34:55,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-16 13:34:55,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:34:55,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:34:55,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:34:55,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:34:56,004 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:34:56,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 112 [2022-02-16 13:34:56,131 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:34:56,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:34:56,441 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:34:56,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-02-16 13:35:15,569 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:35:15,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327862040] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:35:15,570 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:35:15,570 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2022-02-16 13:35:15,570 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941963001] [2022-02-16 13:35:15,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:35:15,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:35:15,571 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:35:15,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:35:15,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:35:15,571 INFO L87 Difference]: Start difference. First operand 148 states and 431 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:35:15,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:35:15,816 INFO L93 Difference]: Finished difference Result 184 states and 514 transitions. [2022-02-16 13:35:15,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-16 13:35:15,816 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:35:15,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:35:15,817 INFO L225 Difference]: With dead ends: 184 [2022-02-16 13:35:15,817 INFO L226 Difference]: Without dead ends: 173 [2022-02-16 13:35:15,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:35:15,817 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 34 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:35:15,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 32 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:35:15,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-02-16 13:35:15,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 162. [2022-02-16 13:35:15,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.968944099378882) internal successors, (478), 161 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:35:15,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 478 transitions. [2022-02-16 13:35:15,821 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 478 transitions. Word has length 16 [2022-02-16 13:35:15,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:35:15,821 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 478 transitions. [2022-02-16 13:35:15,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:35:15,821 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 478 transitions. [2022-02-16 13:35:15,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:35:15,822 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:35:15,822 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:35:15,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-02-16 13:35:16,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-02-16 13:35:16,035 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:35:16,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:35:16,036 INFO L85 PathProgramCache]: Analyzing trace with hash -489871526, now seen corresponding path program 49 times [2022-02-16 13:35:16,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:35:16,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364123358] [2022-02-16 13:35:16,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:35:16,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:35:16,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:35:16,112 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:35:16,112 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:35:16,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364123358] [2022-02-16 13:35:16,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364123358] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:35:16,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776470449] [2022-02-16 13:35:16,112 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:35:16,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:35:16,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:35:16,114 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:35:16,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-16 13:35:16,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:35:16,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:35:16,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:35:16,335 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:35:16,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 112 [2022-02-16 13:35:16,651 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:35:16,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:35:16,947 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:35:16,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-02-16 13:35:22,393 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:35:22,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776470449] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:35:22,393 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:35:22,393 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-02-16 13:35:22,393 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224593357] [2022-02-16 13:35:22,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:35:22,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-16 13:35:22,394 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:35:22,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-16 13:35:22,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:35:22,394 INFO L87 Difference]: Start difference. First operand 162 states and 478 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:35:22,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:35:22,835 INFO L93 Difference]: Finished difference Result 221 states and 581 transitions. [2022-02-16 13:35:22,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-16 13:35:22,835 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:35:22,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:35:22,836 INFO L225 Difference]: With dead ends: 221 [2022-02-16 13:35:22,836 INFO L226 Difference]: Without dead ends: 203 [2022-02-16 13:35:22,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=219, Invalid=1263, Unknown=0, NotChecked=0, Total=1482 [2022-02-16 13:35:22,836 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 63 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:35:22,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 52 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:35:22,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-02-16 13:35:22,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 164. [2022-02-16 13:35:22,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.9754601226993866) internal successors, (485), 163 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:35:22,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 485 transitions. [2022-02-16 13:35:22,840 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 485 transitions. Word has length 16 [2022-02-16 13:35:22,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:35:22,840 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 485 transitions. [2022-02-16 13:35:22,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:35:22,841 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 485 transitions. [2022-02-16 13:35:22,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:35:22,841 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:35:22,841 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:35:22,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-02-16 13:35:23,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-02-16 13:35:23,055 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:35:23,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:35:23,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1220741782, now seen corresponding path program 50 times [2022-02-16 13:35:23,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:35:23,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124796676] [2022-02-16 13:35:23,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:35:23,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:35:23,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:35:23,131 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:35:23,132 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:35:23,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124796676] [2022-02-16 13:35:23,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124796676] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:35:23,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597505174] [2022-02-16 13:35:23,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:35:23,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:35:23,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:35:23,133 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:35:23,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-16 13:35:23,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:35:23,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:35:23,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:35:23,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:35:23,348 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:35:23,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 41 treesize of output 107 [2022-02-16 13:35:23,602 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:35:23,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:35:23,872 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:35:23,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-02-16 13:35:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:35:34,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597505174] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:35:34,627 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:35:34,627 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-02-16 13:35:34,628 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090386006] [2022-02-16 13:35:34,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:35:34,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-16 13:35:34,628 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:35:34,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-16 13:35:34,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:35:34,628 INFO L87 Difference]: Start difference. First operand 164 states and 485 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:35:35,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:35:35,206 INFO L93 Difference]: Finished difference Result 257 states and 630 transitions. [2022-02-16 13:35:35,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-16 13:35:35,206 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:35:35,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:35:35,207 INFO L225 Difference]: With dead ends: 257 [2022-02-16 13:35:35,207 INFO L226 Difference]: Without dead ends: 228 [2022-02-16 13:35:35,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=272, Invalid=1534, Unknown=0, NotChecked=0, Total=1806 [2022-02-16 13:35:35,208 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 84 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:35:35,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 87 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:35:35,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-02-16 13:35:35,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 165. [2022-02-16 13:35:35,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.957317073170732) internal successors, (485), 164 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:35:35,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 485 transitions. [2022-02-16 13:35:35,212 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 485 transitions. Word has length 16 [2022-02-16 13:35:35,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:35:35,212 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 485 transitions. [2022-02-16 13:35:35,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:35:35,212 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 485 transitions. [2022-02-16 13:35:35,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:35:35,213 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:35:35,213 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:35:35,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-02-16 13:35:35,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:35:35,419 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:35:35,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:35:35,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1584820518, now seen corresponding path program 51 times [2022-02-16 13:35:35,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:35:35,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970613063] [2022-02-16 13:35:35,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:35:35,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:35:35,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:35:35,499 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:35:35,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:35:35,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970613063] [2022-02-16 13:35:35,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970613063] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:35:35,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678876561] [2022-02-16 13:35:35,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:35:35,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:35:35,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:35:35,500 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:35:35,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-02-16 13:35:35,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:35:35,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:35:35,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:35:35,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:35:35,721 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:35:35,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 41 treesize of output 107 [2022-02-16 13:35:35,876 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:35:35,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:35:36,128 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:35:36,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-02-16 13:35:53,480 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:35:53,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678876561] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:35:53,481 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:35:53,481 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-16 13:35:53,481 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034392019] [2022-02-16 13:35:53,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:35:53,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-16 13:35:53,481 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:35:53,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-16 13:35:53,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:35:53,482 INFO L87 Difference]: Start difference. First operand 165 states and 485 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:35:54,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:35:54,074 INFO L93 Difference]: Finished difference Result 263 states and 639 transitions. [2022-02-16 13:35:54,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-16 13:35:54,074 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:35:54,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:35:54,075 INFO L225 Difference]: With dead ends: 263 [2022-02-16 13:35:54,075 INFO L226 Difference]: Without dead ends: 234 [2022-02-16 13:35:54,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=272, Invalid=1534, Unknown=0, NotChecked=0, Total=1806 [2022-02-16 13:35:54,075 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 80 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:35:54,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 118 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:35:54,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-02-16 13:35:54,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 160. [2022-02-16 13:35:54,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.943396226415094) internal successors, (468), 159 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:35:54,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 468 transitions. [2022-02-16 13:35:54,079 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 468 transitions. Word has length 16 [2022-02-16 13:35:54,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:35:54,079 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 468 transitions. [2022-02-16 13:35:54,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:35:54,079 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 468 transitions. [2022-02-16 13:35:54,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:35:54,080 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:35:54,080 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:35:54,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-02-16 13:35:54,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:35:54,295 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:35:54,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:35:54,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1637061398, now seen corresponding path program 52 times [2022-02-16 13:35:54,295 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:35:54,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052200622] [2022-02-16 13:35:54,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:35:54,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:35:54,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:35:54,383 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:35:54,383 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:35:54,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052200622] [2022-02-16 13:35:54,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052200622] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:35:54,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129423428] [2022-02-16 13:35:54,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:35:54,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:35:54,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:35:54,384 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:35:54,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-02-16 13:35:54,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:35:54,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:35:54,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:35:54,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:35:54,593 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:35:54,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 41 treesize of output 107 [2022-02-16 13:35:54,891 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:35:54,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:35:55,125 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:35:55,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-02-16 13:36:05,834 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:36:05,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129423428] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:36:05,834 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:36:05,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-16 13:36:05,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444445843] [2022-02-16 13:36:05,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:36:05,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-16 13:36:05,834 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:36:05,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-16 13:36:05,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:36:05,835 INFO L87 Difference]: Start difference. First operand 160 states and 468 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:36:06,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:36:06,243 INFO L93 Difference]: Finished difference Result 214 states and 580 transitions. [2022-02-16 13:36:06,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 13:36:06,243 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:36:06,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:36:06,244 INFO L225 Difference]: With dead ends: 214 [2022-02-16 13:36:06,244 INFO L226 Difference]: Without dead ends: 206 [2022-02-16 13:36:06,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2022-02-16 13:36:06,245 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:36:06,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 32 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:36:06,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-16 13:36:06,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 161. [2022-02-16 13:36:06,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.94375) internal successors, (471), 160 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:36:06,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 471 transitions. [2022-02-16 13:36:06,247 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 471 transitions. Word has length 16 [2022-02-16 13:36:06,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:36:06,247 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 471 transitions. [2022-02-16 13:36:06,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:36:06,248 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 471 transitions. [2022-02-16 13:36:06,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:36:06,248 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:36:06,248 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:36:06,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-02-16 13:36:06,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-02-16 13:36:06,449 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:36:06,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:36:06,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1659832456, now seen corresponding path program 53 times [2022-02-16 13:36:06,449 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:36:06,449 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069812436] [2022-02-16 13:36:06,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:36:06,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:36:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:36:06,532 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:36:06,532 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:36:06,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069812436] [2022-02-16 13:36:06,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069812436] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:36:06,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598378060] [2022-02-16 13:36:06,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:36:06,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:36:06,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:36:06,533 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:36:06,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-02-16 13:36:06,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:36:06,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:36:06,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:36:06,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:36:06,791 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:36:06,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 112 [2022-02-16 13:36:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:36:06,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:36:07,230 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:36:07,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-02-16 13:36:19,441 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:36:19,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598378060] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:36:19,442 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:36:19,442 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-16 13:36:19,442 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929435742] [2022-02-16 13:36:19,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:36:19,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 13:36:19,442 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:36:19,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 13:36:19,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:36:19,442 INFO L87 Difference]: Start difference. First operand 161 states and 471 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:36:19,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:36:19,720 INFO L93 Difference]: Finished difference Result 183 states and 499 transitions. [2022-02-16 13:36:19,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:36:19,720 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:36:19,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:36:19,721 INFO L225 Difference]: With dead ends: 183 [2022-02-16 13:36:19,721 INFO L226 Difference]: Without dead ends: 171 [2022-02-16 13:36:19,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:36:19,721 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 29 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:36:19,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 36 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:36:19,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-02-16 13:36:19,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 161. [2022-02-16 13:36:19,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.93125) internal successors, (469), 160 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:36:19,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 469 transitions. [2022-02-16 13:36:19,724 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 469 transitions. Word has length 16 [2022-02-16 13:36:19,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:36:19,724 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 469 transitions. [2022-02-16 13:36:19,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:36:19,724 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 469 transitions. [2022-02-16 13:36:19,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:36:19,725 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:36:19,725 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:36:19,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-02-16 13:36:19,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:36:19,925 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:36:19,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:36:19,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1214575672, now seen corresponding path program 54 times [2022-02-16 13:36:19,926 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:36:19,926 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24624068] [2022-02-16 13:36:19,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:36:19,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:36:19,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:36:20,005 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:36:20,005 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:36:20,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24624068] [2022-02-16 13:36:20,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24624068] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:36:20,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611195129] [2022-02-16 13:36:20,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:36:20,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:36:20,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:36:20,006 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:36:20,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-02-16 13:36:20,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:36:20,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:36:20,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:36:20,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:36:20,215 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:36:20,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 41 treesize of output 107 [2022-02-16 13:36:20,525 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:36:20,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:36:20,755 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:36:20,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-02-16 13:36:33,356 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:36:33,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611195129] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:36:33,356 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:36:33,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-16 13:36:33,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811634360] [2022-02-16 13:36:33,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:36:33,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-16 13:36:33,356 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:36:33,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-16 13:36:33,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:36:33,357 INFO L87 Difference]: Start difference. First operand 161 states and 469 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:36:33,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:36:33,825 INFO L93 Difference]: Finished difference Result 221 states and 597 transitions. [2022-02-16 13:36:33,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-16 13:36:33,825 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:36:33,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:36:33,826 INFO L225 Difference]: With dead ends: 221 [2022-02-16 13:36:33,826 INFO L226 Difference]: Without dead ends: 213 [2022-02-16 13:36:33,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=1406, Unknown=0, NotChecked=0, Total=1640 [2022-02-16 13:36:33,827 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 18 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:36:33,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 29 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:36:33,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-02-16 13:36:33,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 165. [2022-02-16 13:36:33,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.932926829268293) internal successors, (481), 164 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:36:33,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 481 transitions. [2022-02-16 13:36:33,831 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 481 transitions. Word has length 16 [2022-02-16 13:36:33,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:36:33,831 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 481 transitions. [2022-02-16 13:36:33,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:36:33,831 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 481 transitions. [2022-02-16 13:36:33,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:36:33,831 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:36:33,832 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:36:33,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-02-16 13:36:34,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-02-16 13:36:34,043 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:36:34,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:36:34,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1562946764, now seen corresponding path program 55 times [2022-02-16 13:36:34,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:36:34,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668820652] [2022-02-16 13:36:34,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:36:34,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:36:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:36:34,133 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:36:34,134 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:36:34,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668820652] [2022-02-16 13:36:34,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668820652] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:36:34,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315731000] [2022-02-16 13:36:34,134 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:36:34,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:36:34,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:36:34,135 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:36:34,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-02-16 13:36:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:36:34,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:36:34,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:36:34,403 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:36:34,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 112 [2022-02-16 13:36:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:36:34,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:36:34,842 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:36:34,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-02-16 13:36:53,847 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:36:53,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315731000] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:36:53,847 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:36:53,847 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2022-02-16 13:36:53,847 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629584598] [2022-02-16 13:36:53,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:36:53,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:36:53,847 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:36:53,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:36:53,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:36:53,848 INFO L87 Difference]: Start difference. First operand 165 states and 481 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:36:54,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:36:54,069 INFO L93 Difference]: Finished difference Result 200 states and 564 transitions. [2022-02-16 13:36:54,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 13:36:54,069 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:36:54,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:36:54,070 INFO L225 Difference]: With dead ends: 200 [2022-02-16 13:36:54,070 INFO L226 Difference]: Without dead ends: 190 [2022-02-16 13:36:54,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:36:54,070 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 43 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:36:54,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 30 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:36:54,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-02-16 13:36:54,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 183. [2022-02-16 13:36:54,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9725274725274726) internal successors, (541), 182 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:36:54,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 541 transitions. [2022-02-16 13:36:54,074 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 541 transitions. Word has length 16 [2022-02-16 13:36:54,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:36:54,074 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 541 transitions. [2022-02-16 13:36:54,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:36:54,074 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 541 transitions. [2022-02-16 13:36:54,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:36:54,075 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:36:54,075 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:36:54,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-02-16 13:36:54,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-02-16 13:36:54,291 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:36:54,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:36:54,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1013676826, now seen corresponding path program 56 times [2022-02-16 13:36:54,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:36:54,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708053] [2022-02-16 13:36:54,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:36:54,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:36:54,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:36:54,370 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:36:54,371 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:36:54,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708053] [2022-02-16 13:36:54,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708053] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:36:54,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091932941] [2022-02-16 13:36:54,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:36:54,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:36:54,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:36:54,372 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:36:54,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-02-16 13:36:54,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:36:54,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:36:54,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:36:54,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:36:54,565 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:36:54,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 112 [2022-02-16 13:36:54,734 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:36:54,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:36:55,027 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:36:55,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-02-16 13:36:59,994 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:36:59,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091932941] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:36:59,994 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:36:59,994 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-02-16 13:36:59,994 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328847821] [2022-02-16 13:36:59,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:36:59,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-16 13:36:59,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:36:59,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-16 13:36:59,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:36:59,995 INFO L87 Difference]: Start difference. First operand 183 states and 541 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:37:00,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:37:00,433 INFO L93 Difference]: Finished difference Result 235 states and 642 transitions. [2022-02-16 13:37:00,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-16 13:37:00,433 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:37:00,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:37:00,434 INFO L225 Difference]: With dead ends: 235 [2022-02-16 13:37:00,434 INFO L226 Difference]: Without dead ends: 227 [2022-02-16 13:37:00,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=246, Invalid=1394, Unknown=0, NotChecked=0, Total=1640 [2022-02-16 13:37:00,435 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 36 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:37:00,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 32 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:37:00,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-02-16 13:37:00,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 185. [2022-02-16 13:37:00,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.983695652173913) internal successors, (549), 184 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:37:00,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 549 transitions. [2022-02-16 13:37:00,438 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 549 transitions. Word has length 16 [2022-02-16 13:37:00,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:37:00,439 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 549 transitions. [2022-02-16 13:37:00,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:37:00,439 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 549 transitions. [2022-02-16 13:37:00,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:37:00,439 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:37:00,440 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:37:00,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-02-16 13:37:00,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:37:00,662 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:37:00,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:37:00,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1570677162, now seen corresponding path program 57 times [2022-02-16 13:37:00,662 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:37:00,662 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835668655] [2022-02-16 13:37:00,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:37:00,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:37:00,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:37:00,739 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:37:00,739 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:37:00,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835668655] [2022-02-16 13:37:00,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835668655] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:37:00,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633336018] [2022-02-16 13:37:00,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:37:00,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:37:00,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:37:00,741 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:37:00,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-02-16 13:37:00,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:37:00,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:37:00,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:37:00,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:37:00,961 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:37:00,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 41 treesize of output 107 [2022-02-16 13:37:01,272 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:37:01,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:37:01,543 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:37:01,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-02-16 13:37:12,563 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:37:12,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633336018] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:37:12,563 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:37:12,563 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-02-16 13:37:12,563 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955993732] [2022-02-16 13:37:12,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:37:12,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-16 13:37:12,564 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:37:12,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-16 13:37:12,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:37:12,564 INFO L87 Difference]: Start difference. First operand 185 states and 549 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:37:13,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:37:13,237 INFO L93 Difference]: Finished difference Result 285 states and 706 transitions. [2022-02-16 13:37:13,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-16 13:37:13,237 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:37:13,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:37:13,238 INFO L225 Difference]: With dead ends: 285 [2022-02-16 13:37:13,238 INFO L226 Difference]: Without dead ends: 252 [2022-02-16 13:37:13,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=336, Invalid=1920, Unknown=0, NotChecked=0, Total=2256 [2022-02-16 13:37:13,239 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 103 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:37:13,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 101 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:37:13,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-02-16 13:37:13,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 190. [2022-02-16 13:37:13,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.9735449735449735) internal successors, (562), 189 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:37:13,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 562 transitions. [2022-02-16 13:37:13,243 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 562 transitions. Word has length 16 [2022-02-16 13:37:13,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:37:13,243 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 562 transitions. [2022-02-16 13:37:13,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:37:13,243 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 562 transitions. [2022-02-16 13:37:13,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:37:13,244 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:37:13,244 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:37:13,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-02-16 13:37:13,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:37:13,444 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:37:13,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:37:13,445 INFO L85 PathProgramCache]: Analyzing trace with hash -81272166, now seen corresponding path program 58 times [2022-02-16 13:37:13,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:37:13,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554160335] [2022-02-16 13:37:13,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:37:13,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:37:13,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:37:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:37:13,534 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:37:13,534 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554160335] [2022-02-16 13:37:13,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554160335] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:37:13,534 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938706661] [2022-02-16 13:37:13,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:37:13,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:37:13,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:37:13,539 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:37:13,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-02-16 13:37:13,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:37:13,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:37:13,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:37:13,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:37:13,761 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:37:13,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 41 treesize of output 107 [2022-02-16 13:37:14,046 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:37:14,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:37:14,309 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:37:14,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-02-16 13:37:25,386 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:37:25,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938706661] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:37:25,387 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:37:25,387 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2022-02-16 13:37:25,387 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176046153] [2022-02-16 13:37:25,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:37:25,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-16 13:37:25,387 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:37:25,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-16 13:37:25,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:37:25,388 INFO L87 Difference]: Start difference. First operand 190 states and 562 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:37:25,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:37:25,833 INFO L93 Difference]: Finished difference Result 253 states and 671 transitions. [2022-02-16 13:37:25,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-16 13:37:25,834 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:37:25,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:37:25,835 INFO L225 Difference]: With dead ends: 253 [2022-02-16 13:37:25,835 INFO L226 Difference]: Without dead ends: 241 [2022-02-16 13:37:25,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=223, Invalid=1337, Unknown=0, NotChecked=0, Total=1560 [2022-02-16 13:37:25,835 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 31 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:37:25,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 102 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:37:25,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-02-16 13:37:25,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 194. [2022-02-16 13:37:25,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.9689119170984455) internal successors, (573), 193 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:37:25,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 573 transitions. [2022-02-16 13:37:25,839 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 573 transitions. Word has length 16 [2022-02-16 13:37:25,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:37:25,840 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 573 transitions. [2022-02-16 13:37:25,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:37:25,840 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 573 transitions. [2022-02-16 13:37:25,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:37:25,840 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:37:25,840 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:37:25,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-02-16 13:37:26,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-02-16 13:37:26,054 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:37:26,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:37:26,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1154357546, now seen corresponding path program 59 times [2022-02-16 13:37:26,055 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:37:26,055 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082510222] [2022-02-16 13:37:26,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:37:26,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:37:26,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:37:26,135 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:37:26,135 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:37:26,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082510222] [2022-02-16 13:37:26,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082510222] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:37:26,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747515320] [2022-02-16 13:37:26,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:37:26,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:37:26,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:37:26,137 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:37:26,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-02-16 13:37:26,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:37:26,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:37:26,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:37:26,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:37:26,352 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:37:26,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 41 treesize of output 107 [2022-02-16 13:37:26,520 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:37:26,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:37:26,749 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:37:26,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-02-16 13:37:31,226 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:37:31,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747515320] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:37:31,227 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:37:31,227 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-16 13:37:31,227 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128354010] [2022-02-16 13:37:31,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:37:31,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-16 13:37:31,227 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:37:31,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-16 13:37:31,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:37:31,227 INFO L87 Difference]: Start difference. First operand 194 states and 573 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:37:31,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:37:31,715 INFO L93 Difference]: Finished difference Result 267 states and 710 transitions. [2022-02-16 13:37:31,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-16 13:37:31,715 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:37:31,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:37:31,716 INFO L225 Difference]: With dead ends: 267 [2022-02-16 13:37:31,716 INFO L226 Difference]: Without dead ends: 249 [2022-02-16 13:37:31,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=251, Invalid=1389, Unknown=0, NotChecked=0, Total=1640 [2022-02-16 13:37:31,717 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 52 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:37:31,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 46 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:37:31,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-02-16 13:37:31,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 192. [2022-02-16 13:37:31,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.973821989528796) internal successors, (568), 191 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:37:31,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 568 transitions. [2022-02-16 13:37:31,721 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 568 transitions. Word has length 16 [2022-02-16 13:37:31,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:37:31,721 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 568 transitions. [2022-02-16 13:37:31,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:37:31,721 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 568 transitions. [2022-02-16 13:37:31,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-16 13:37:31,722 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:37:31,722 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:37:31,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-02-16 13:37:31,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-02-16 13:37:31,931 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:37:31,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:37:31,932 INFO L85 PathProgramCache]: Analyzing trace with hash -60265958, now seen corresponding path program 60 times [2022-02-16 13:37:31,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:37:31,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143946868] [2022-02-16 13:37:31,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:37:31,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:37:31,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:37:32,018 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:37:32,019 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:37:32,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143946868] [2022-02-16 13:37:32,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143946868] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:37:32,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774507727] [2022-02-16 13:37:32,019 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:37:32,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:37:32,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:37:32,020 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:37:32,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-02-16 13:37:32,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:37:32,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:37:32,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:37:32,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:37:32,236 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:37:32,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 41 treesize of output 107 [2022-02-16 13:37:32,522 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:37:32,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:37:32,731 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:37:32,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 47 treesize of output 330 [2022-02-16 13:37:39,889 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:37:39,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774507727] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:37:39,889 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:37:39,889 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-16 13:37:39,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300929302] [2022-02-16 13:37:39,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:37:39,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:37:39,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:37:39,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:37:39,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:37:39,890 INFO L87 Difference]: Start difference. First operand 192 states and 568 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:37:40,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:37:40,227 INFO L93 Difference]: Finished difference Result 245 states and 687 transitions. [2022-02-16 13:37:40,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:37:40,228 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-16 13:37:40,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:37:40,228 INFO L225 Difference]: With dead ends: 245 [2022-02-16 13:37:40,228 INFO L226 Difference]: Without dead ends: 241 [2022-02-16 13:37:40,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2022-02-16 13:37:40,229 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:37:40,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 25 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:37:40,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-02-16 13:37:40,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 193. [2022-02-16 13:37:40,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.9635416666666665) internal successors, (569), 192 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:37:40,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 569 transitions. [2022-02-16 13:37:40,232 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 569 transitions. Word has length 16 [2022-02-16 13:37:40,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:37:40,233 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 569 transitions. [2022-02-16 13:37:40,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:37:40,233 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 569 transitions. [2022-02-16 13:37:40,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:37:40,233 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:37:40,233 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:37:40,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-02-16 13:37:40,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:37:40,455 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:37:40,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:37:40,456 INFO L85 PathProgramCache]: Analyzing trace with hash -330401105, now seen corresponding path program 61 times [2022-02-16 13:37:40,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:37:40,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654123932] [2022-02-16 13:37:40,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:37:40,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:37:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:37:40,561 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:37:40,562 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:37:40,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654123932] [2022-02-16 13:37:40,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654123932] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:37:40,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556066119] [2022-02-16 13:37:40,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:37:40,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:37:40,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:37:40,563 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:37:40,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-02-16 13:37:40,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:37:40,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-16 13:37:40,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:37:40,810 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:37:40,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 112 [2022-02-16 13:37:40,939 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:37:40,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:37:41,303 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:37:41,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 18 new quantified variables, introduced 45 case distinctions, treesize of input 51 treesize of output 406 [2022-02-16 13:38:08,796 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:38:08,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556066119] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:38:08,797 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:38:08,797 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-02-16 13:38:08,797 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45956859] [2022-02-16 13:38:08,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:38:08,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 13:38:08,797 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:38:08,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 13:38:08,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:38:08,797 INFO L87 Difference]: Start difference. First operand 193 states and 569 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:38:09,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:38:09,438 INFO L93 Difference]: Finished difference Result 257 states and 658 transitions. [2022-02-16 13:38:09,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-16 13:38:09,438 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:38:09,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:38:09,439 INFO L225 Difference]: With dead ends: 257 [2022-02-16 13:38:09,439 INFO L226 Difference]: Without dead ends: 220 [2022-02-16 13:38:09,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=1397, Unknown=0, NotChecked=0, Total=1640 [2022-02-16 13:38:09,439 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 61 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:38:09,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 118 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:38:09,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-02-16 13:38:09,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 197. [2022-02-16 13:38:09,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.938775510204082) internal successors, (576), 196 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:38:09,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 576 transitions. [2022-02-16 13:38:09,442 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 576 transitions. Word has length 17 [2022-02-16 13:38:09,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:38:09,442 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 576 transitions. [2022-02-16 13:38:09,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:38:09,442 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 576 transitions. [2022-02-16 13:38:09,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:38:09,443 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:38:09,443 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:38:09,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-02-16 13:38:09,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-02-16 13:38:09,643 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:38:09,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:38:09,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1621863602, now seen corresponding path program 62 times [2022-02-16 13:38:09,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:38:09,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73438758] [2022-02-16 13:38:09,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:38:09,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:38:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:38:09,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:38:09,680 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:38:09,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73438758] [2022-02-16 13:38:09,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73438758] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:38:09,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588615052] [2022-02-16 13:38:09,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:38:09,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:38:09,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:38:09,682 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:38:09,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-02-16 13:38:09,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:38:09,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:38:09,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 13:38:09,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:38:09,735 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:38:09,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:38:09,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:38:09,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588615052] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:38:09,772 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:38:09,772 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2022-02-16 13:38:09,772 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429108353] [2022-02-16 13:38:09,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:38:09,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-16 13:38:09,773 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:38:09,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-16 13:38:09,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-02-16 13:38:09,773 INFO L87 Difference]: Start difference. First operand 197 states and 576 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:38:09,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:38:09,840 INFO L93 Difference]: Finished difference Result 349 states and 846 transitions. [2022-02-16 13:38:09,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:38:09,841 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:38:09,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:38:09,842 INFO L225 Difference]: With dead ends: 349 [2022-02-16 13:38:09,842 INFO L226 Difference]: Without dead ends: 349 [2022-02-16 13:38:09,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-16 13:38:09,842 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 63 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:38:09,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 46 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:38:09,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-02-16 13:38:09,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 221. [2022-02-16 13:38:09,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 3.0272727272727273) internal successors, (666), 220 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:38:09,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 666 transitions. [2022-02-16 13:38:09,848 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 666 transitions. Word has length 17 [2022-02-16 13:38:09,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:38:09,848 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 666 transitions. [2022-02-16 13:38:09,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:38:09,848 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 666 transitions. [2022-02-16 13:38:09,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:38:09,849 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:38:09,849 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:38:09,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-02-16 13:38:10,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-02-16 13:38:10,050 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:38:10,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:38:10,050 INFO L85 PathProgramCache]: Analyzing trace with hash 922562961, now seen corresponding path program 63 times [2022-02-16 13:38:10,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:38:10,050 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185111653] [2022-02-16 13:38:10,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:38:10,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:38:10,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:38:10,132 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:38:10,132 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:38:10,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185111653] [2022-02-16 13:38:10,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185111653] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:38:10,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838751923] [2022-02-16 13:38:10,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:38:10,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:38:10,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:38:10,134 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:38:10,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-02-16 13:38:10,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:38:10,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:38:10,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-16 13:38:10,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:38:10,369 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:38:10,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2022-02-16 13:38:10,464 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:38:10,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:38:10,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:38:10,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 18 new quantified variables, introduced 45 case distinctions, treesize of input 51 treesize of output 406 [2022-02-16 13:38:53,025 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:38:53,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838751923] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:38:53,026 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:38:53,026 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-02-16 13:38:53,026 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721425430] [2022-02-16 13:38:53,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:38:53,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-16 13:38:53,026 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:38:53,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-16 13:38:53,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:38:53,026 INFO L87 Difference]: Start difference. First operand 221 states and 666 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:38:53,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:38:53,305 INFO L93 Difference]: Finished difference Result 260 states and 729 transitions. [2022-02-16 13:38:53,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 13:38:53,305 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:38:53,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:38:53,306 INFO L225 Difference]: With dead ends: 260 [2022-02-16 13:38:53,306 INFO L226 Difference]: Without dead ends: 256 [2022-02-16 13:38:53,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:38:53,307 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:38:53,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 44 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:38:53,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-02-16 13:38:53,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 221. [2022-02-16 13:38:53,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 3.0272727272727273) internal successors, (666), 220 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:38:53,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 666 transitions. [2022-02-16 13:38:53,311 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 666 transitions. Word has length 17 [2022-02-16 13:38:53,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:38:53,311 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 666 transitions. [2022-02-16 13:38:53,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:38:53,312 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 666 transitions. [2022-02-16 13:38:53,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:38:53,312 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:38:53,312 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:38:53,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-02-16 13:38:53,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:38:53,527 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:38:53,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:38:53,528 INFO L85 PathProgramCache]: Analyzing trace with hash 940796463, now seen corresponding path program 64 times [2022-02-16 13:38:53,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:38:53,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224983489] [2022-02-16 13:38:53,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:38:53,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:38:53,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:38:53,611 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:38:53,611 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:38:53,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224983489] [2022-02-16 13:38:53,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224983489] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:38:53,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816669674] [2022-02-16 13:38:53,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:38:53,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:38:53,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:38:53,612 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:38:53,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-02-16 13:38:53,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:38:53,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:38:53,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-16 13:38:53,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:38:53,844 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:38:53,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 112 [2022-02-16 13:38:54,025 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:38:54,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:38:54,382 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:38:54,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 18 new quantified variables, introduced 45 case distinctions, treesize of input 51 treesize of output 406 [2022-02-16 13:39:05,742 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:39:05,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816669674] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:39:05,743 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:39:05,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2022-02-16 13:39:05,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120503956] [2022-02-16 13:39:05,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:39:05,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:39:05,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:39:05,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:39:05,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:39:05,743 INFO L87 Difference]: Start difference. First operand 221 states and 666 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:39:06,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:39:06,077 INFO L93 Difference]: Finished difference Result 265 states and 737 transitions. [2022-02-16 13:39:06,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-16 13:39:06,077 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:39:06,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:39:06,078 INFO L225 Difference]: With dead ends: 265 [2022-02-16 13:39:06,078 INFO L226 Difference]: Without dead ends: 243 [2022-02-16 13:39:06,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 13:39:06,078 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 58 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:39:06,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 60 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:39:06,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-02-16 13:39:06,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 223. [2022-02-16 13:39:06,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 3.0135135135135136) internal successors, (669), 222 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:39:06,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 669 transitions. [2022-02-16 13:39:06,082 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 669 transitions. Word has length 17 [2022-02-16 13:39:06,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:39:06,082 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 669 transitions. [2022-02-16 13:39:06,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:39:06,082 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 669 transitions. [2022-02-16 13:39:06,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:39:06,083 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:39:06,083 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:39:06,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-02-16 13:39:06,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2022-02-16 13:39:06,306 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:39:06,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:39:06,306 INFO L85 PathProgramCache]: Analyzing trace with hash 933066065, now seen corresponding path program 65 times [2022-02-16 13:39:06,306 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:39:06,306 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723247598] [2022-02-16 13:39:06,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:39:06,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:39:06,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:39:06,395 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:39:06,395 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:39:06,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723247598] [2022-02-16 13:39:06,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723247598] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:39:06,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029842116] [2022-02-16 13:39:06,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:39:06,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:39:06,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:39:06,396 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:39:06,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-02-16 13:39:06,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-16 13:39:06,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:39:06,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-16 13:39:06,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:39:06,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:39:06,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2022-02-16 13:39:06,753 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:39:06,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:39:07,101 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:39:07,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 18 new quantified variables, introduced 45 case distinctions, treesize of input 51 treesize of output 406 [2022-02-16 13:39:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:39:57,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029842116] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:39:57,957 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:39:57,957 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-02-16 13:39:57,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524945110] [2022-02-16 13:39:57,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:39:57,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-16 13:39:57,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:39:57,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-16 13:39:57,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:39:57,958 INFO L87 Difference]: Start difference. First operand 223 states and 669 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:39:58,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:39:58,206 INFO L93 Difference]: Finished difference Result 267 states and 731 transitions. [2022-02-16 13:39:58,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 13:39:58,207 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:39:58,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:39:58,208 INFO L225 Difference]: With dead ends: 267 [2022-02-16 13:39:58,208 INFO L226 Difference]: Without dead ends: 262 [2022-02-16 13:39:58,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:39:58,208 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:39:58,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 29 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:39:58,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-02-16 13:39:58,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 226. [2022-02-16 13:39:58,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.991111111111111) internal successors, (673), 225 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:39:58,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 673 transitions. [2022-02-16 13:39:58,213 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 673 transitions. Word has length 17 [2022-02-16 13:39:58,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:39:58,213 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 673 transitions. [2022-02-16 13:39:58,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:39:58,213 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 673 transitions. [2022-02-16 13:39:58,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:39:58,214 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:39:58,214 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:39:58,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-02-16 13:39:58,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:39:58,431 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:39:58,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:39:58,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1872496235, now seen corresponding path program 66 times [2022-02-16 13:39:58,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:39:58,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630734192] [2022-02-16 13:39:58,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:39:58,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:39:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:39:58,509 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:39:58,509 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:39:58,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630734192] [2022-02-16 13:39:58,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630734192] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:39:58,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138917166] [2022-02-16 13:39:58,509 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:39:58,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:39:58,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:39:58,512 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:39:58,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-02-16 13:39:58,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-16 13:39:58,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:39:58,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-16 13:39:58,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:39:58,750 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:39:58,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2022-02-16 13:39:58,852 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:39:58,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:39:59,173 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:39:59,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 18 new quantified variables, introduced 45 case distinctions, treesize of input 51 treesize of output 406 [2022-02-16 13:40:28,402 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:40:28,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138917166] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:40:28,403 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:40:28,403 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-02-16 13:40:28,403 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705115572] [2022-02-16 13:40:28,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:40:28,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-16 13:40:28,403 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:40:28,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-16 13:40:28,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:40:28,404 INFO L87 Difference]: Start difference. First operand 226 states and 673 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:40:28,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:40:28,798 INFO L93 Difference]: Finished difference Result 299 states and 800 transitions. [2022-02-16 13:40:28,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-16 13:40:28,799 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:40:28,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:40:28,800 INFO L225 Difference]: With dead ends: 299 [2022-02-16 13:40:28,800 INFO L226 Difference]: Without dead ends: 285 [2022-02-16 13:40:28,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2022-02-16 13:40:28,800 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 40 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:40:28,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 47 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:40:28,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-02-16 13:40:28,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 223. [2022-02-16 13:40:28,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.9864864864864864) internal successors, (663), 222 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:40:28,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 663 transitions. [2022-02-16 13:40:28,805 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 663 transitions. Word has length 17 [2022-02-16 13:40:28,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:40:28,805 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 663 transitions. [2022-02-16 13:40:28,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:40:28,805 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 663 transitions. [2022-02-16 13:40:28,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:40:28,806 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:40:28,806 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:40:28,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-02-16 13:40:29,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:40:29,028 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:40:29,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:40:29,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1266392687, now seen corresponding path program 67 times [2022-02-16 13:40:29,029 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:40:29,029 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806192003] [2022-02-16 13:40:29,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:40:29,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:40:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:40:29,102 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:40:29,102 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:40:29,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806192003] [2022-02-16 13:40:29,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806192003] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:40:29,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77201946] [2022-02-16 13:40:29,102 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:40:29,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:40:29,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:40:29,104 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:40:29,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-02-16 13:40:29,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:40:29,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-16 13:40:29,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:40:29,333 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:40:29,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 112 [2022-02-16 13:40:29,500 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:40:29,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:40:29,863 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:40:29,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 18 new quantified variables, introduced 45 case distinctions, treesize of input 51 treesize of output 406 [2022-02-16 13:41:09,849 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:41:09,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77201946] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:41:09,849 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:41:09,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2022-02-16 13:41:09,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468702270] [2022-02-16 13:41:09,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:41:09,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:41:09,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:41:09,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:41:09,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:41:09,850 INFO L87 Difference]: Start difference. First operand 223 states and 663 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:41:10,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:41:10,165 INFO L93 Difference]: Finished difference Result 256 states and 713 transitions. [2022-02-16 13:41:10,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:41:10,166 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:41:10,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:41:10,167 INFO L225 Difference]: With dead ends: 256 [2022-02-16 13:41:10,167 INFO L226 Difference]: Without dead ends: 236 [2022-02-16 13:41:10,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:41:10,167 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 57 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:41:10,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 49 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:41:10,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-16 13:41:10,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 222. [2022-02-16 13:41:10,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.9547511312217196) internal successors, (653), 221 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:41:10,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 653 transitions. [2022-02-16 13:41:10,172 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 653 transitions. Word has length 17 [2022-02-16 13:41:10,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:41:10,172 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 653 transitions. [2022-02-16 13:41:10,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:41:10,172 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 653 transitions. [2022-02-16 13:41:10,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:41:10,173 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:41:10,173 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:41:10,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-02-16 13:41:10,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:41:10,387 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:41:10,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:41:10,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1258662289, now seen corresponding path program 68 times [2022-02-16 13:41:10,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:41:10,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999611803] [2022-02-16 13:41:10,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:41:10,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:41:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:41:10,464 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:41:10,464 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:41:10,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999611803] [2022-02-16 13:41:10,465 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999611803] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:41:10,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117309572] [2022-02-16 13:41:10,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:41:10,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:41:10,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:41:10,466 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:41:10,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-02-16 13:41:10,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:41:10,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:41:10,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-16 13:41:10,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:41:10,718 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:41:10,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2022-02-16 13:41:10,881 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:41:10,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:41:11,227 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:41:11,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 18 new quantified variables, introduced 45 case distinctions, treesize of input 51 treesize of output 406 [2022-02-16 13:41:59,038 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:41:59,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117309572] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:41:59,038 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:41:59,038 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-02-16 13:41:59,038 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727117262] [2022-02-16 13:41:59,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:41:59,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-16 13:41:59,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:41:59,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-16 13:41:59,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:41:59,039 INFO L87 Difference]: Start difference. First operand 222 states and 653 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:41:59,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:41:59,286 INFO L93 Difference]: Finished difference Result 252 states and 694 transitions. [2022-02-16 13:41:59,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-16 13:41:59,286 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:41:59,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:41:59,287 INFO L225 Difference]: With dead ends: 252 [2022-02-16 13:41:59,287 INFO L226 Difference]: Without dead ends: 248 [2022-02-16 13:41:59,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:41:59,288 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:41:59,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 50 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:41:59,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-16 13:41:59,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 223. [2022-02-16 13:41:59,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.945945945945946) internal successors, (654), 222 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:41:59,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 654 transitions. [2022-02-16 13:41:59,291 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 654 transitions. Word has length 17 [2022-02-16 13:41:59,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:41:59,291 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 654 transitions. [2022-02-16 13:41:59,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:41:59,291 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 654 transitions. [2022-02-16 13:41:59,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:41:59,292 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:41:59,292 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:41:59,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-02-16 13:41:59,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-02-16 13:41:59,495 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:41:59,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:41:59,495 INFO L85 PathProgramCache]: Analyzing trace with hash -541061776, now seen corresponding path program 69 times [2022-02-16 13:41:59,495 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:41:59,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262773911] [2022-02-16 13:41:59,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:41:59,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:41:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:41:59,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:41:59,544 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:41:59,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262773911] [2022-02-16 13:41:59,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262773911] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:41:59,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614407728] [2022-02-16 13:41:59,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:41:59,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:41:59,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:41:59,546 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:41:59,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-02-16 13:41:59,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 13:41:59,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:41:59,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-16 13:41:59,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:41:59,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:41:59,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:41:59,638 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:41:59,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614407728] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:41:59,638 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:41:59,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 11 [2022-02-16 13:41:59,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178284737] [2022-02-16 13:41:59,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:41:59,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-16 13:41:59,639 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:41:59,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-16 13:41:59,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-02-16 13:41:59,639 INFO L87 Difference]: Start difference. First operand 223 states and 654 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:41:59,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:41:59,725 INFO L93 Difference]: Finished difference Result 351 states and 856 transitions. [2022-02-16 13:41:59,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:41:59,726 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:41:59,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:41:59,727 INFO L225 Difference]: With dead ends: 351 [2022-02-16 13:41:59,727 INFO L226 Difference]: Without dead ends: 351 [2022-02-16 13:41:59,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:41:59,728 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 74 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:41:59,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 73 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:41:59,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-02-16 13:41:59,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 237. [2022-02-16 13:41:59,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.9703389830508473) internal successors, (701), 236 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:41:59,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 701 transitions. [2022-02-16 13:41:59,733 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 701 transitions. Word has length 17 [2022-02-16 13:41:59,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:41:59,733 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 701 transitions. [2022-02-16 13:41:59,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:41:59,733 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 701 transitions. [2022-02-16 13:41:59,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:41:59,733 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:41:59,733 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:41:59,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-02-16 13:41:59,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:41:59,947 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:41:59,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:41:59,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1546900011, now seen corresponding path program 70 times [2022-02-16 13:41:59,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:41:59,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639702045] [2022-02-16 13:41:59,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:41:59,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:41:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:00,029 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:00,029 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:00,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639702045] [2022-02-16 13:42:00,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639702045] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:00,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88967769] [2022-02-16 13:42:00,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:42:00,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:00,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:00,031 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:00,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-02-16 13:42:00,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:42:00,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:00,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-16 13:42:00,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:00,261 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:42:00,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2022-02-16 13:42:00,521 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:00,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:00,849 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:42:00,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 18 new quantified variables, introduced 45 case distinctions, treesize of input 51 treesize of output 406 [2022-02-16 13:42:30,236 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:30,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88967769] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:42:30,237 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:42:30,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-16 13:42:30,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216498173] [2022-02-16 13:42:30,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:42:30,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-16 13:42:30,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:42:30,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-16 13:42:30,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:42:30,237 INFO L87 Difference]: Start difference. First operand 237 states and 701 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:30,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:42:30,590 INFO L93 Difference]: Finished difference Result 286 states and 758 transitions. [2022-02-16 13:42:30,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-16 13:42:30,590 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:42:30,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:42:30,591 INFO L225 Difference]: With dead ends: 286 [2022-02-16 13:42:30,591 INFO L226 Difference]: Without dead ends: 272 [2022-02-16 13:42:30,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2022-02-16 13:42:30,592 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 47 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:42:30,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 48 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:42:30,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-16 13:42:30,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 235. [2022-02-16 13:42:30,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.9615384615384617) internal successors, (693), 234 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:30,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 693 transitions. [2022-02-16 13:42:30,595 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 693 transitions. Word has length 17 [2022-02-16 13:42:30,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:42:30,595 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 693 transitions. [2022-02-16 13:42:30,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:42:30,595 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 693 transitions. [2022-02-16 13:42:30,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:42:30,596 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:42:30,596 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:42:30,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-02-16 13:42:30,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:30,796 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:42:30,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:42:30,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1674981905, now seen corresponding path program 71 times [2022-02-16 13:42:30,797 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:42:30,797 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723783867] [2022-02-16 13:42:30,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:42:30,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:42:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:42:30,879 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:30,880 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:42:30,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723783867] [2022-02-16 13:42:30,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723783867] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:42:30,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476646952] [2022-02-16 13:42:30,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:42:30,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:42:30,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:42:30,881 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:42:30,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-02-16 13:42:30,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 13:42:30,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:42:30,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-16 13:42:30,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:42:31,123 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:42:31,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2022-02-16 13:42:31,209 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:42:31,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:42:31,513 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:42:31,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 18 new quantified variables, introduced 45 case distinctions, treesize of input 51 treesize of output 406 [2022-02-16 13:43:51,596 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:51,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476646952] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:43:51,597 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:43:51,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-16 13:43:51,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729394380] [2022-02-16 13:43:51,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:43:51,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-16 13:43:51,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:43:51,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-16 13:43:51,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:43:51,597 INFO L87 Difference]: Start difference. First operand 235 states and 693 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:51,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:43:51,873 INFO L93 Difference]: Finished difference Result 298 states and 802 transitions. [2022-02-16 13:43:51,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 13:43:51,873 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:43:51,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:43:51,874 INFO L225 Difference]: With dead ends: 298 [2022-02-16 13:43:51,874 INFO L226 Difference]: Without dead ends: 294 [2022-02-16 13:43:51,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:43:51,874 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 28 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:43:51,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 54 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:43:51,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-02-16 13:43:51,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 235. [2022-02-16 13:43:51,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.9615384615384617) internal successors, (693), 234 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:51,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 693 transitions. [2022-02-16 13:43:51,878 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 693 transitions. Word has length 17 [2022-02-16 13:43:51,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:43:51,878 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 693 transitions. [2022-02-16 13:43:51,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:43:51,879 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 693 transitions. [2022-02-16 13:43:51,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:43:51,879 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:43:51,879 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:43:51,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-02-16 13:43:52,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-02-16 13:43:52,083 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:43:52,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:43:52,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1621911949, now seen corresponding path program 72 times [2022-02-16 13:43:52,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:43:52,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262824425] [2022-02-16 13:43:52,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:43:52,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:43:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:43:52,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:52,163 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:43:52,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262824425] [2022-02-16 13:43:52,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262824425] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:43:52,164 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856526290] [2022-02-16 13:43:52,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:43:52,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:43:52,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:43:52,165 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:43:52,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-02-16 13:43:52,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 13:43:52,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:43:52,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-16 13:43:52,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:43:52,434 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:43:52,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 112 [2022-02-16 13:43:52,642 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:43:52,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:43:53,015 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:43:53,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 18 new quantified variables, introduced 45 case distinctions, treesize of input 51 treesize of output 406 [2022-02-16 13:44:11,434 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:11,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856526290] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:11,434 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:11,434 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2022-02-16 13:44:11,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485871617] [2022-02-16 13:44:11,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:11,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:44:11,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:11,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:44:11,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:44:11,435 INFO L87 Difference]: Start difference. First operand 235 states and 693 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:11,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:11,725 INFO L93 Difference]: Finished difference Result 264 states and 742 transitions. [2022-02-16 13:44:11,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 13:44:11,725 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:44:11,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:11,726 INFO L225 Difference]: With dead ends: 264 [2022-02-16 13:44:11,726 INFO L226 Difference]: Without dead ends: 255 [2022-02-16 13:44:11,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:44:11,726 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 22 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:11,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:44:11,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-02-16 13:44:11,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 236. [2022-02-16 13:44:11,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.9617021276595743) internal successors, (696), 235 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:11,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 696 transitions. [2022-02-16 13:44:11,730 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 696 transitions. Word has length 17 [2022-02-16 13:44:11,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:11,730 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 696 transitions. [2022-02-16 13:44:11,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:11,730 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 696 transitions. [2022-02-16 13:44:11,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:44:11,731 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:11,731 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:11,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-02-16 13:44:11,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-02-16 13:44:11,932 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:11,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:11,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1252496179, now seen corresponding path program 73 times [2022-02-16 13:44:11,933 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:11,933 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568921060] [2022-02-16 13:44:11,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:11,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:11,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:12,022 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:12,022 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:12,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568921060] [2022-02-16 13:44:12,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568921060] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:12,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577938798] [2022-02-16 13:44:12,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:44:12,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:12,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:12,024 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:12,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-02-16 13:44:12,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:12,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-16 13:44:12,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:12,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:44:12,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2022-02-16 13:44:12,455 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:12,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:12,757 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:44:12,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 18 new quantified variables, introduced 45 case distinctions, treesize of input 51 treesize of output 406 [2022-02-16 13:44:39,347 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:39,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577938798] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:44:39,348 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:44:39,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-16 13:44:39,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784548924] [2022-02-16 13:44:39,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:44:39,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-16 13:44:39,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:44:39,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-16 13:44:39,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:44:39,348 INFO L87 Difference]: Start difference. First operand 236 states and 696 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:39,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:44:39,683 INFO L93 Difference]: Finished difference Result 283 states and 747 transitions. [2022-02-16 13:44:39,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 13:44:39,683 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:44:39,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:44:39,684 INFO L225 Difference]: With dead ends: 283 [2022-02-16 13:44:39,684 INFO L226 Difference]: Without dead ends: 271 [2022-02-16 13:44:39,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:44:39,685 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 49 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:44:39,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 71 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:44:39,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-02-16 13:44:39,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 236. [2022-02-16 13:44:39,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.953191489361702) internal successors, (694), 235 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:39,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 694 transitions. [2022-02-16 13:44:39,689 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 694 transitions. Word has length 17 [2022-02-16 13:44:39,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:44:39,690 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 694 transitions. [2022-02-16 13:44:39,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:44:39,690 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 694 transitions. [2022-02-16 13:44:39,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:44:39,690 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:44:39,690 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:44:39,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-02-16 13:44:39,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:39,911 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-16 13:44:39,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:44:39,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1525026257, now seen corresponding path program 74 times [2022-02-16 13:44:39,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:44:39,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640020408] [2022-02-16 13:44:39,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:44:39,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:44:39,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:44:39,998 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:39,998 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:44:39,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640020408] [2022-02-16 13:44:39,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640020408] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:44:39,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714524739] [2022-02-16 13:44:39,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:44:39,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:39,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:44:39,999 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:44:40,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-02-16 13:44:40,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:44:40,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:44:40,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-16 13:44:40,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:44:40,241 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:44:40,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 112 [2022-02-16 13:44:40,410 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:44:40,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:44:40,798 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:44:40,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 18 new quantified variables, introduced 45 case distinctions, treesize of input 51 treesize of output 406 Received shutdown request... [2022-02-16 13:44:59,174 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-16 13:44:59,174 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-02-16 13:44:59,176 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-02-16 13:44:59,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-02-16 13:44:59,223 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-16 13:44:59,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:44:59,377 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 3ms.. [2022-02-16 13:44:59,378 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-02-16 13:44:59,378 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-02-16 13:44:59,380 INFO L732 BasicCegarLoop]: Path program histogram: [74, 5, 2, 1] [2022-02-16 13:44:59,382 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-16 13:44:59,382 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-16 13:44:59,383 INFO L202 PluginConnector]: Adding new model unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.02 01:44:59 BasicIcfg [2022-02-16 13:44:59,383 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-16 13:44:59,384 INFO L158 Benchmark]: Toolchain (without parser) took 765034.71ms. Allocated memory was 192.9MB in the beginning and 678.4MB in the end (delta: 485.5MB). Free memory was 149.7MB in the beginning and 291.2MB in the end (delta: -141.5MB). Peak memory consumption was 416.3MB. Max. memory is 8.0GB. [2022-02-16 13:44:59,384 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 192.9MB. Free memory is still 150.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-16 13:44:59,384 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.43ms. Allocated memory is still 192.9MB. Free memory was 149.7MB in the beginning and 148.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-16 13:44:59,384 INFO L158 Benchmark]: Boogie Preprocessor took 10.33ms. Allocated memory is still 192.9MB. Free memory was 148.1MB in the beginning and 147.2MB in the end (delta: 909.7kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-16 13:44:59,384 INFO L158 Benchmark]: RCFGBuilder took 196.10ms. Allocated memory is still 192.9MB. Free memory was 147.1MB in the beginning and 137.3MB in the end (delta: 9.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-16 13:44:59,384 INFO L158 Benchmark]: TraceAbstraction took 764800.10ms. Allocated memory was 192.9MB in the beginning and 678.4MB in the end (delta: 485.5MB). Free memory was 136.8MB in the beginning and 291.2MB in the end (delta: -154.4MB). Peak memory consumption was 402.7MB. Max. memory is 8.0GB. [2022-02-16 13:44:59,384 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12ms. Allocated memory is still 192.9MB. Free memory is still 150.8MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 24.43ms. Allocated memory is still 192.9MB. Free memory was 149.7MB in the beginning and 148.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 10.33ms. Allocated memory is still 192.9MB. Free memory was 148.1MB in the beginning and 147.2MB in the end (delta: 909.7kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 196.10ms. Allocated memory is still 192.9MB. Free memory was 147.1MB in the beginning and 137.3MB in the end (delta: 9.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 764800.10ms. Allocated memory was 192.9MB in the beginning and 678.4MB in the end (delta: 485.5MB). Free memory was 136.8MB in the beginning and 291.2MB in the end (delta: -154.4MB). Peak memory consumption was 402.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 3ms.. - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 3ms.. - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 3ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 22 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 764.7s, OverallIterations: 82, TraceHistogramMax: 5, PathProgramHistogramMax: 74, EmptinessCheckTime: 0.0s, AutomataDifference: 17.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2665 SdHoareTripleChecker+Valid, 10.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2665 mSDsluCounter, 3086 SdHoareTripleChecker+Invalid, 8.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6388 mSDsCounter, 2180 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 25120 IncrementalHoareTripleChecker+Invalid, 27300 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2180 mSolverCounterUnsat, 486 mSDtfsCounter, 25120 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3314 GetRequests, 1530 SyntacticMatches, 68 SemanticMatches, 1716 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11287 ImplicationChecksByTransitivity, 17.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=237occurred in iteration=77, InterpolantAutomatonStates: 1285, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 81 MinimizatonAttempts, 2500 StatesRemovedByMinimization, 80 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 707.8s InterpolantComputationTime, 2349 NumberOfCodeBlocks, 2349 NumberOfCodeBlocksAsserted, 257 NumberOfCheckSat, 3267 ConstructedInterpolants, 0 QuantifiedInterpolants, 29627 SizeOfPredicates, 279 NumberOfNonLiveVariables, 4302 ConjunctsInSsa, 1582 ConjunctsInUnsatCore, 235 InterpolantComputations, 4 PerfectInterpolantSequences, 297/2410 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown